mirror of https://github.com/grpc/grpc.git
kpayson64
8 years ago
parent
062ba7b8ba
commit
d195cf589d
31 changed files with 1010 additions and 6 deletions
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/*
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* |
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* Copyright 2016, Google Inc. |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are |
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* met: |
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* |
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* * Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* * Redistributions in binary form must reproduce the above |
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* copyright notice, this list of conditions and the following disclaimer |
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* in the documentation and/or other materials provided with the |
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* distribution. |
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* * Neither the name of Google Inc. nor the names of its |
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* contributors may be used to endorse or promote products derived from |
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* this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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*/ |
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#include <grpc/support/port_platform.h> |
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#ifdef GPR_POSIX_SOCKET |
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#include "src/core/lib/iomgr/ev_poll_cv_posix.h" |
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#include <errno.h> |
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#include <string.h> |
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#include <grpc/support/alloc.h> |
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#include <grpc/support/log.h> |
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#include <grpc/support/sync.h> |
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#include <grpc/support/thd.h> |
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#include <grpc/support/time.h> |
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#include <grpc/support/useful.h> |
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#include "src/core/lib/iomgr/ev_poll_posix.h" |
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#include "src/core/lib/iomgr/wakeup_fd_posix.h" |
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#define POLL_PERIOD_MS 1000 |
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#define DEFAULT_TABLE_SIZE 16 |
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typedef enum status_t { INPROGRESS, COMPLETED, CANCELLED } status_t; |
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typedef struct poll_args { |
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gpr_refcount refcount; |
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gpr_cv* cv; |
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struct pollfd* fds; |
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nfds_t nfds; |
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int timeout; |
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int retval; |
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int err; |
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status_t status; |
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} poll_args; |
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cv_fd_table g_cvfds; |
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static void decref_poll_args(poll_args* args) { |
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if (gpr_unref(&args->refcount)) { |
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gpr_free(args->fds); |
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gpr_cv_destroy(args->cv); |
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gpr_free(args->cv); |
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gpr_free(args); |
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} |
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} |
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// Poll in a background thread
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static void run_poll(void* arg) { |
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int timeout, retval; |
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poll_args* pargs = (poll_args*)arg; |
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while (pargs->status == INPROGRESS) { |
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if (pargs->timeout < 0) { |
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timeout = POLL_PERIOD_MS; |
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} else { |
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timeout = GPR_MIN(POLL_PERIOD_MS, pargs->timeout); |
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pargs->timeout -= timeout; |
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} |
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retval = g_cvfds.poll(pargs->fds, pargs->nfds, timeout); |
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if (retval != 0 || pargs->timeout == 0) { |
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pargs->retval = retval; |
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pargs->err = errno; |
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break; |
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} |
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} |
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gpr_mu_lock(&g_cvfds.mu); |
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if (pargs->status == INPROGRESS) { |
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// Signal main thread that the poll completed
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pargs->status = COMPLETED; |
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gpr_cv_signal(pargs->cv); |
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} |
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decref_poll_args(pargs); |
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g_cvfds.pollcount--; |
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if (g_cvfds.shutdown && g_cvfds.pollcount == 0) { |
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gpr_cv_signal(&g_cvfds.shutdown_complete); |
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} |
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gpr_mu_unlock(&g_cvfds.mu); |
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} |
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// This function overrides poll() to handle condition variable wakeup fds
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static int cvfd_poll(struct pollfd* fds, nfds_t nfds, int timeout) { |
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unsigned int i; |
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int res, idx; |
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gpr_cv* pollcv; |
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cv_node *cvn, *prev; |
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nfds_t nsockfds = 0; |
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gpr_thd_id t_id; |
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gpr_thd_options opt; |
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poll_args* pargs = NULL; |
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gpr_mu_lock(&g_cvfds.mu); |
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pollcv = gpr_malloc(sizeof(gpr_cv)); |
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gpr_cv_init(pollcv); |
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for (i = 0; i < nfds; i++) { |
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fds[i].revents = 0; |
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if (fds[i].fd < 0 && (fds[i].events & POLLIN)) { |
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idx = FD_TO_IDX(fds[i].fd); |
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cvn = gpr_malloc(sizeof(cv_node)); |
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cvn->cv = pollcv; |
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cvn->next = g_cvfds.cvfds[idx].cvs; |
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g_cvfds.cvfds[idx].cvs = cvn; |
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// We should return immediately if there are pending events,
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// but we still need to call poll() to check for socket events
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if (g_cvfds.cvfds[idx].is_set) { |
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timeout = 0; |
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} |
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} else if (fds[i].fd >= 0) { |
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nsockfds++; |
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} |
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} |
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if (nsockfds > 0) { |
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pargs = gpr_malloc(sizeof(struct poll_args)); |
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// Both the main thread and calling thread get a reference
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gpr_ref_init(&pargs->refcount, 2); |
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pargs->cv = pollcv; |
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pargs->fds = gpr_malloc(sizeof(struct pollfd) * nsockfds); |
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pargs->nfds = nsockfds; |
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pargs->timeout = timeout; |
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pargs->retval = 0; |
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pargs->err = 0; |
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pargs->status = INPROGRESS; |
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idx = 0; |
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for (i = 0; i < nfds; i++) { |
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if (fds[i].fd >= 0) { |
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pargs->fds[idx].fd = fds[i].fd; |
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pargs->fds[idx].events = fds[i].events; |
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pargs->fds[idx].revents = 0; |
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idx++; |
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} |
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} |
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g_cvfds.pollcount++; |
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opt = gpr_thd_options_default(); |
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gpr_thd_options_set_detached(&opt); |
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gpr_thd_new(&t_id, &run_poll, pargs, &opt); |
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// We want the poll() thread to trigger the deadline, so wait forever here
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gpr_cv_wait(pollcv, &g_cvfds.mu, gpr_inf_future(GPR_CLOCK_MONOTONIC)); |
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if (pargs->status == COMPLETED) { |
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res = pargs->retval; |
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errno = pargs->err; |
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} else { |
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res = 0; |
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errno = 0; |
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pargs->status = CANCELLED; |
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} |
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} else { |
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gpr_timespec deadline = gpr_now(GPR_CLOCK_REALTIME); |
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deadline = |
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gpr_time_add(deadline, gpr_time_from_millis(timeout, GPR_TIMESPAN)); |
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gpr_cv_wait(pollcv, &g_cvfds.mu, deadline); |
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res = 0; |
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} |
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idx = 0; |
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for (i = 0; i < nfds; i++) { |
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if (fds[i].fd < 0 && (fds[i].events & POLLIN)) { |
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cvn = g_cvfds.cvfds[FD_TO_IDX(fds[i].fd)].cvs; |
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prev = NULL; |
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while (cvn->cv != pollcv) { |
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prev = cvn; |
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cvn = cvn->next; |
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GPR_ASSERT(cvn); |
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} |
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if (!prev) { |
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g_cvfds.cvfds[FD_TO_IDX(fds[i].fd)].cvs = cvn->next; |
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} else { |
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prev->next = cvn->next; |
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} |
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gpr_free(cvn); |
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if (g_cvfds.cvfds[FD_TO_IDX(fds[i].fd)].is_set) { |
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fds[i].revents = POLLIN; |
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if (res >= 0) res++; |
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} |
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} else if (fds[i].fd >= 0 && pargs->status == COMPLETED) { |
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fds[i].revents = pargs->fds[idx].revents; |
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idx++; |
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} |
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} |
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if (pargs) { |
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decref_poll_args(pargs); |
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} else { |
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gpr_cv_destroy(pollcv); |
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gpr_free(pollcv); |
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} |
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gpr_mu_unlock(&g_cvfds.mu); |
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return res; |
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} |
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static void grpc_global_cv_fd_table_init() { |
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gpr_mu_init(&g_cvfds.mu); |
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gpr_mu_lock(&g_cvfds.mu); |
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gpr_cv_init(&g_cvfds.shutdown_complete); |
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g_cvfds.shutdown = 0; |
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g_cvfds.pollcount = 0; |
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g_cvfds.size = DEFAULT_TABLE_SIZE; |
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g_cvfds.cvfds = gpr_malloc(sizeof(fd_node) * DEFAULT_TABLE_SIZE); |
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g_cvfds.free_fds = NULL; |
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for (int i = 0; i < DEFAULT_TABLE_SIZE; i++) { |
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g_cvfds.cvfds[i].is_set = 0; |
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g_cvfds.cvfds[i].cvs = NULL; |
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g_cvfds.cvfds[i].next_free = g_cvfds.free_fds; |
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g_cvfds.free_fds = &g_cvfds.cvfds[i]; |
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} |
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// Override the poll function with one that supports cvfds
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g_cvfds.poll = grpc_poll_function; |
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grpc_poll_function = &cvfd_poll; |
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gpr_mu_unlock(&g_cvfds.mu); |
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} |
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static void grpc_global_cv_fd_table_shutdown() { |
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gpr_mu_lock(&g_cvfds.mu); |
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g_cvfds.shutdown = 1; |
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// Attempt to wait for all abandoned poll() threads to terminate
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// Not doing so will result in reported memory leaks
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if (g_cvfds.pollcount > 0) { |
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int res = gpr_cv_wait(&g_cvfds.shutdown_complete, &g_cvfds.mu, |
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gpr_time_add(gpr_now(GPR_CLOCK_REALTIME), |
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gpr_time_from_seconds(3, GPR_TIMESPAN))); |
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GPR_ASSERT(res == 0); |
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} |
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gpr_cv_destroy(&g_cvfds.shutdown_complete); |
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grpc_poll_function = g_cvfds.poll; |
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gpr_free(g_cvfds.cvfds); |
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gpr_mu_unlock(&g_cvfds.mu); |
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gpr_mu_destroy(&g_cvfds.mu); |
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} |
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/*******************************************************************************
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* event engine binding |
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*/ |
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static const grpc_event_engine_vtable* ev_poll_vtable; |
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static grpc_event_engine_vtable vtable; |
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static void shutdown_engine(void) { |
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ev_poll_vtable->shutdown_engine(); |
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grpc_global_cv_fd_table_shutdown(); |
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} |
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const grpc_event_engine_vtable* grpc_init_poll_cv_posix(void) { |
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int has_wakeup_fd = grpc_has_wakeup_fd; |
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int allow_specialized_wakeup_fd = grpc_allow_specialized_wakeup_fd; |
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int allow_pipe_wakeup_fd = grpc_allow_pipe_wakeup_fd; |
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grpc_global_cv_fd_table_init(); |
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grpc_allow_specialized_wakeup_fd = 0; |
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grpc_allow_pipe_wakeup_fd = 0; |
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grpc_wakeup_fd_global_init(); |
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grpc_has_wakeup_fd = 1; |
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ev_poll_vtable = grpc_init_poll_posix(); |
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if (!ev_poll_vtable) { |
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grpc_global_cv_fd_table_shutdown(); |
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grpc_has_wakeup_fd = has_wakeup_fd; |
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grpc_allow_specialized_wakeup_fd = allow_specialized_wakeup_fd; |
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grpc_allow_pipe_wakeup_fd = allow_pipe_wakeup_fd; |
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grpc_global_cv_fd_table_init(); |
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return NULL; |
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} |
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vtable = *ev_poll_vtable; |
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vtable.shutdown_engine = shutdown_engine; |
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return &vtable; |
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} |
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#endif /* GPR_POSIX_SOCKET */ |
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@ -0,0 +1,68 @@ |
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/*
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* |
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* Copyright 2016, Google Inc. |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are |
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* met: |
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* |
||||
* * Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
||||
* * Redistributions in binary form must reproduce the above |
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* copyright notice, this list of conditions and the following disclaimer |
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* in the documentation and/or other materials provided with the |
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* distribution. |
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* * Neither the name of Google Inc. nor the names of its |
||||
* contributors may be used to endorse or promote products derived from |
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* this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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*/ |
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#ifndef GRPC_CORE_LIB_IOMGR_EV_POLL_CV_POSIX_H |
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#define GRPC_CORE_LIB_IOMGR_EV_POLL_CV_POSIX_H |
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#include <grpc/support/sync.h> |
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#include "src/core/lib/iomgr/ev_posix.h" |
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#define FD_TO_IDX(fd) (-(fd)-1) |
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#define IDX_TO_FD(idx) (-(idx)-1) |
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typedef struct cv_node { |
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gpr_cv* cv; |
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struct cv_node* next; |
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} cv_node; |
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typedef struct fd_node { |
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int is_set; |
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cv_node* cvs; |
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struct fd_node* next_free; |
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} fd_node; |
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typedef struct cv_fd_table { |
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gpr_mu mu; |
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int pollcount; |
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int shutdown; |
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gpr_cv shutdown_complete; |
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fd_node* cvfds; |
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fd_node* free_fds; |
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unsigned int size; |
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grpc_poll_function_type poll; |
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} cv_fd_table; |
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const grpc_event_engine_vtable* grpc_init_poll_cv_posix(void); |
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#endif /* GRPC_CORE_LIB_IOMGR_EV_POLL_CV_POSIX_H */ |
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@ -0,0 +1,118 @@ |
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/*
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* |
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* Copyright 2016, Google Inc. |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
||||
* modification, are permitted provided that the following conditions are |
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* met: |
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* |
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* * Redistributions of source code must retain the above copyright |
||||
* notice, this list of conditions and the following disclaimer. |
||||
* * Redistributions in binary form must reproduce the above |
||||
* copyright notice, this list of conditions and the following disclaimer |
||||
* in the documentation and/or other materials provided with the |
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* distribution. |
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* * Neither the name of Google Inc. nor the names of its |
||||
* contributors may be used to endorse or promote products derived from |
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* this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
||||
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
||||
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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*/ |
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#include <grpc/support/port_platform.h> |
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#ifdef GPR_POSIX_WAKEUP_FD |
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#include <errno.h> |
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#include <string.h> |
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#include <grpc/support/alloc.h> |
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#include <grpc/support/log.h> |
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#include <grpc/support/sync.h> |
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#include <grpc/support/thd.h> |
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#include <grpc/support/time.h> |
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#include <grpc/support/useful.h> |
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#include "src/core/lib/iomgr/ev_poll_cv_posix.h" |
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#define MAX_TABLE_RESIZE 256 |
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extern cv_fd_table g_cvfds; |
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static grpc_error* cv_fd_init(grpc_wakeup_fd* fd_info) { |
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unsigned int i, newsize; |
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int idx; |
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gpr_mu_lock(&g_cvfds.mu); |
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if (!g_cvfds.free_fds) { |
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newsize = GPR_MIN(g_cvfds.size * 2, g_cvfds.size + MAX_TABLE_RESIZE); |
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g_cvfds.cvfds = gpr_realloc(g_cvfds.cvfds, sizeof(fd_node) * newsize); |
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for (i = g_cvfds.size; i < newsize; i++) { |
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g_cvfds.cvfds[i].is_set = 0; |
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g_cvfds.cvfds[i].cvs = NULL; |
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g_cvfds.cvfds[i].next_free = g_cvfds.free_fds; |
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g_cvfds.free_fds = &g_cvfds.cvfds[i]; |
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} |
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g_cvfds.size = newsize; |
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} |
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idx = (int)(g_cvfds.free_fds - g_cvfds.cvfds); |
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g_cvfds.free_fds = g_cvfds.free_fds->next_free; |
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g_cvfds.cvfds[idx].cvs = NULL; |
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g_cvfds.cvfds[idx].is_set = 0; |
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fd_info->read_fd = IDX_TO_FD(idx); |
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fd_info->write_fd = -1; |
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gpr_mu_unlock(&g_cvfds.mu); |
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return GRPC_ERROR_NONE; |
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} |
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static grpc_error* cv_fd_wakeup(grpc_wakeup_fd* fd_info) { |
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cv_node* cvn; |
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gpr_mu_lock(&g_cvfds.mu); |
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g_cvfds.cvfds[FD_TO_IDX(fd_info->read_fd)].is_set = 1; |
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cvn = g_cvfds.cvfds[FD_TO_IDX(fd_info->read_fd)].cvs; |
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while (cvn) { |
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gpr_cv_signal(cvn->cv); |
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cvn = cvn->next; |
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} |
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gpr_mu_unlock(&g_cvfds.mu); |
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return GRPC_ERROR_NONE; |
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} |
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static grpc_error* cv_fd_consume(grpc_wakeup_fd* fd_info) { |
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gpr_mu_lock(&g_cvfds.mu); |
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g_cvfds.cvfds[FD_TO_IDX(fd_info->read_fd)].is_set = 0; |
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gpr_mu_unlock(&g_cvfds.mu); |
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return GRPC_ERROR_NONE; |
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} |
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static void cv_fd_destroy(grpc_wakeup_fd* fd_info) { |
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if (fd_info->read_fd == 0) { |
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return; |
||||
} |
||||
gpr_mu_lock(&g_cvfds.mu); |
||||
// Assert that there are no active pollers
|
||||
GPR_ASSERT(!g_cvfds.cvfds[FD_TO_IDX(fd_info->read_fd)].cvs); |
||||
g_cvfds.cvfds[FD_TO_IDX(fd_info->read_fd)].next_free = g_cvfds.free_fds; |
||||
g_cvfds.free_fds = &g_cvfds.cvfds[FD_TO_IDX(fd_info->read_fd)]; |
||||
gpr_mu_unlock(&g_cvfds.mu); |
||||
} |
||||
|
||||
static int cv_check_availability(void) { return 1; } |
||||
|
||||
const grpc_wakeup_fd_vtable grpc_cv_wakeup_fd_vtable = { |
||||
cv_fd_init, cv_fd_consume, cv_fd_wakeup, cv_fd_destroy, |
||||
cv_check_availability}; |
||||
|
||||
#endif /* GPR_POSIX_WAKUP_FD */ |
||||
@ -0,0 +1,55 @@ |
||||
/*
|
||||
* |
||||
* Copyright 2016, Google Inc. |
||||
* All rights reserved. |
||||
* |
||||
* Redistribution and use in source and binary forms, with or without |
||||
* modification, are permitted provided that the following conditions are |
||||
* met: |
||||
* |
||||
* * Redistributions of source code must retain the above copyright |
||||
* notice, this list of conditions and the following disclaimer. |
||||
* * Redistributions in binary form must reproduce the above |
||||
* copyright notice, this list of conditions and the following disclaimer |
||||
* in the documentation and/or other materials provided with the |
||||
* distribution. |
||||
* * Neither the name of Google Inc. nor the names of its |
||||
* contributors may be used to endorse or promote products derived from |
||||
* this software without specific prior written permission. |
||||
* |
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
||||
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
||||
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
||||
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
||||
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
||||
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
||||
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
||||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
||||
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
||||
* |
||||
*/ |
||||
|
||||
/*
|
||||
* wakeup_fd_cv uses condition variables to implement wakeup fds. |
||||
* |
||||
* It is intended for use only in cases when eventfd() and pipe() are not |
||||
* available. It can only be used with the "poll" engine. |
||||
* |
||||
* Implementation: |
||||
* A global table of cv wakeup fds is mantained. A cv wakeup fd is a negative |
||||
* file descriptor. poll() is then run in a background thread with only the |
||||
* real socket fds while we wait on a condition variable trigged by either the |
||||
* poll() completion or a wakeup_fd() call. |
||||
* |
||||
*/ |
||||
|
||||
#ifndef GRPC_CORE_LIB_IOMGR_WAKEUP_FD_CV_H |
||||
#define GRPC_CORE_LIB_IOMGR_WAKEUP_FD_CV_H |
||||
|
||||
#include "src/core/lib/iomgr/wakeup_fd_posix.h" |
||||
|
||||
extern grpc_wakeup_fd_vtable grpc_cv_wakeup_fd_vtable; |
||||
|
||||
#endif /* GRPC_CORE_LIB_IOMGR_WAKEUP_FD_CV_H */ |
||||
@ -0,0 +1,240 @@ |
||||
/*
|
||||
* |
||||
* Copyright 2016, Google Inc. |
||||
* All rights reserved. |
||||
* |
||||
* Redistribution and use in source and binary forms, with or without |
||||
* modification, are permitted provided that the following conditions are |
||||
* met: |
||||
* |
||||
* * Redistributions of source code must retain the above copyright |
||||
* notice, this list of conditions and the following disclaimer. |
||||
* * Redistributions in binary form must reproduce the above |
||||
* copyright notice, this list of conditions and the following disclaimer |
||||
* in the documentation and/or other materials provided with the |
||||
* distribution. |
||||
* * Neither the name of Google Inc. nor the names of its |
||||
* contributors may be used to endorse or promote products derived from |
||||
* this software without specific prior written permission. |
||||
* |
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
||||
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
||||
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
||||
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
||||
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
||||
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
||||
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
||||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
||||
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
||||
* |
||||
*/ |
||||
|
||||
#include <pthread.h> |
||||
|
||||
#include <grpc/support/log.h> |
||||
#include <grpc/support/thd.h> |
||||
#include <grpc/support/time.h> |
||||
#include <grpc/support/useful.h> |
||||
|
||||
#include "src/core/lib/iomgr/ev_posix.h" |
||||
#include "src/core/lib/iomgr/iomgr_posix.h" |
||||
#include "src/core/lib/support/env.h" |
||||
|
||||
typedef struct poll_args { |
||||
struct pollfd *fds; |
||||
nfds_t nfds; |
||||
int timeout; |
||||
int result; |
||||
} poll_args; |
||||
|
||||
gpr_cv poll_cv; |
||||
gpr_mu poll_mu; |
||||
static int socket_event = 0; |
||||
|
||||
// Trigger a "socket" POLLIN in mock_poll()
|
||||
void trigger_socket_event() { |
||||
gpr_mu_lock(&poll_mu); |
||||
socket_event = 1; |
||||
gpr_cv_broadcast(&poll_cv); |
||||
gpr_mu_unlock(&poll_mu); |
||||
} |
||||
|
||||
void reset_socket_event() { |
||||
gpr_mu_lock(&poll_mu); |
||||
socket_event = 0; |
||||
gpr_mu_unlock(&poll_mu); |
||||
} |
||||
|
||||
// Mocks posix poll() function
|
||||
int mock_poll(struct pollfd *fds, nfds_t nfds, int timeout) { |
||||
int res = 0; |
||||
gpr_timespec poll_time; |
||||
gpr_mu_lock(&poll_mu); |
||||
GPR_ASSERT(nfds == 3); |
||||
GPR_ASSERT(fds[0].fd == 20); |
||||
GPR_ASSERT(fds[1].fd == 30); |
||||
GPR_ASSERT(fds[2].fd == 50); |
||||
GPR_ASSERT(fds[0].events == (POLLIN | POLLHUP)); |
||||
GPR_ASSERT(fds[1].events == (POLLIN | POLLHUP)); |
||||
GPR_ASSERT(fds[2].events == POLLIN); |
||||
|
||||
if (timeout < 0) { |
||||
poll_time = gpr_inf_future(GPR_CLOCK_REALTIME); |
||||
} else { |
||||
poll_time = gpr_time_add(gpr_now(GPR_CLOCK_REALTIME), |
||||
gpr_time_from_millis(timeout, GPR_TIMESPAN)); |
||||
} |
||||
|
||||
if (socket_event || !gpr_cv_wait(&poll_cv, &poll_mu, poll_time)) { |
||||
fds[0].revents = POLLIN; |
||||
res = 1; |
||||
} |
||||
gpr_mu_unlock(&poll_mu); |
||||
return res; |
||||
} |
||||
|
||||
void background_poll(void *args) { |
||||
poll_args *pargs = (poll_args *)args; |
||||
pargs->result = grpc_poll_function(pargs->fds, pargs->nfds, pargs->timeout); |
||||
} |
||||
|
||||
void test_many_fds(void) { |
||||
int i; |
||||
grpc_wakeup_fd fd[1000]; |
||||
for (i = 0; i < 1000; i++) { |
||||
GPR_ASSERT(grpc_wakeup_fd_init(&fd[i]) == GRPC_ERROR_NONE); |
||||
} |
||||
for (i = 0; i < 1000; i++) { |
||||
grpc_wakeup_fd_destroy(&fd[i]); |
||||
} |
||||
} |
||||
|
||||
void test_poll_cv_trigger(void) { |
||||
grpc_wakeup_fd cvfd1, cvfd2, cvfd3; |
||||
struct pollfd pfds[6]; |
||||
poll_args pargs; |
||||
gpr_thd_id t_id; |
||||
gpr_thd_options opt; |
||||
|
||||
GPR_ASSERT(grpc_wakeup_fd_init(&cvfd1) == GRPC_ERROR_NONE); |
||||
GPR_ASSERT(grpc_wakeup_fd_init(&cvfd2) == GRPC_ERROR_NONE); |
||||
GPR_ASSERT(grpc_wakeup_fd_init(&cvfd3) == GRPC_ERROR_NONE); |
||||
GPR_ASSERT(cvfd1.read_fd < 0); |
||||
GPR_ASSERT(cvfd2.read_fd < 0); |
||||
GPR_ASSERT(cvfd3.read_fd < 0); |
||||
GPR_ASSERT(cvfd1.read_fd != cvfd2.read_fd); |
||||
GPR_ASSERT(cvfd2.read_fd != cvfd3.read_fd); |
||||
GPR_ASSERT(cvfd1.read_fd != cvfd3.read_fd); |
||||
|
||||
pfds[0].fd = cvfd1.read_fd; |
||||
pfds[1].fd = cvfd2.read_fd; |
||||
pfds[2].fd = 20; |
||||
pfds[3].fd = 30; |
||||
pfds[4].fd = cvfd3.read_fd; |
||||
pfds[5].fd = 50; |
||||
|
||||
pfds[0].events = 0; |
||||
pfds[1].events = POLLIN; |
||||
pfds[2].events = POLLIN | POLLHUP; |
||||
pfds[3].events = POLLIN | POLLHUP; |
||||
pfds[4].events = POLLIN; |
||||
pfds[5].events = POLLIN; |
||||
|
||||
pargs.fds = pfds; |
||||
pargs.nfds = 6; |
||||
pargs.timeout = 1000; |
||||
pargs.result = -2; |
||||
|
||||
opt = gpr_thd_options_default(); |
||||
gpr_thd_options_set_joinable(&opt); |
||||
gpr_thd_new(&t_id, &background_poll, &pargs, &opt); |
||||
|
||||
// Wakeup wakeup_fd not listening for events
|
||||
GPR_ASSERT(grpc_wakeup_fd_wakeup(&cvfd1) == GRPC_ERROR_NONE); |
||||
gpr_thd_join(t_id); |
||||
GPR_ASSERT(pargs.result == 0); |
||||
GPR_ASSERT(pfds[0].revents == 0); |
||||
GPR_ASSERT(pfds[1].revents == 0); |
||||
GPR_ASSERT(pfds[2].revents == 0); |
||||
GPR_ASSERT(pfds[3].revents == 0); |
||||
GPR_ASSERT(pfds[4].revents == 0); |
||||
GPR_ASSERT(pfds[5].revents == 0); |
||||
|
||||
// Pollin on socket fd
|
||||
pargs.timeout = -1; |
||||
pargs.result = -2; |
||||
gpr_thd_new(&t_id, &background_poll, &pargs, &opt); |
||||
trigger_socket_event(); |
||||
gpr_thd_join(t_id); |
||||
GPR_ASSERT(pargs.result == 1); |
||||
GPR_ASSERT(pfds[0].revents == 0); |
||||
GPR_ASSERT(pfds[1].revents == 0); |
||||
GPR_ASSERT(pfds[2].revents == POLLIN); |
||||
GPR_ASSERT(pfds[3].revents == 0); |
||||
GPR_ASSERT(pfds[4].revents == 0); |
||||
GPR_ASSERT(pfds[5].revents == 0); |
||||
|
||||
// Pollin on wakeup fd
|
||||
reset_socket_event(); |
||||
pargs.result = -2; |
||||
gpr_thd_new(&t_id, &background_poll, &pargs, &opt); |
||||
GPR_ASSERT(grpc_wakeup_fd_wakeup(&cvfd2) == GRPC_ERROR_NONE); |
||||
gpr_thd_join(t_id); |
||||
|
||||
GPR_ASSERT(pargs.result == 1); |
||||
GPR_ASSERT(pfds[0].revents == 0); |
||||
GPR_ASSERT(pfds[1].revents == POLLIN); |
||||
GPR_ASSERT(pfds[2].revents == 0); |
||||
GPR_ASSERT(pfds[3].revents == 0); |
||||
GPR_ASSERT(pfds[4].revents == 0); |
||||
GPR_ASSERT(pfds[5].revents == 0); |
||||
|
||||
// Pollin on wakeup fd + socket fd
|
||||
trigger_socket_event(); |
||||
pargs.result = -2; |
||||
gpr_thd_new(&t_id, &background_poll, &pargs, &opt); |
||||
gpr_thd_join(t_id); |
||||
|
||||
GPR_ASSERT(pargs.result == 2); |
||||
GPR_ASSERT(pfds[0].revents == 0); |
||||
GPR_ASSERT(pfds[1].revents == POLLIN); |
||||
GPR_ASSERT(pfds[2].revents == POLLIN); |
||||
GPR_ASSERT(pfds[3].revents == 0); |
||||
GPR_ASSERT(pfds[4].revents == 0); |
||||
GPR_ASSERT(pfds[5].revents == 0); |
||||
|
||||
// No Events
|
||||
pargs.result = -2; |
||||
pargs.timeout = 1000; |
||||
reset_socket_event(); |
||||
GPR_ASSERT(grpc_wakeup_fd_consume_wakeup(&cvfd1) == GRPC_ERROR_NONE); |
||||
GPR_ASSERT(grpc_wakeup_fd_consume_wakeup(&cvfd2) == GRPC_ERROR_NONE); |
||||
gpr_thd_new(&t_id, &background_poll, &pargs, &opt); |
||||
gpr_thd_join(t_id); |
||||
|
||||
GPR_ASSERT(pargs.result == 0); |
||||
GPR_ASSERT(pfds[0].revents == 0); |
||||
GPR_ASSERT(pfds[1].revents == 0); |
||||
GPR_ASSERT(pfds[2].revents == 0); |
||||
GPR_ASSERT(pfds[3].revents == 0); |
||||
GPR_ASSERT(pfds[4].revents == 0); |
||||
GPR_ASSERT(pfds[5].revents == 0); |
||||
} |
||||
|
||||
int main(int argc, char **argv) { |
||||
gpr_setenv("GRPC_POLL_STRATEGY", "poll-cv"); |
||||
grpc_poll_function = &mock_poll; |
||||
gpr_mu_init(&poll_mu); |
||||
gpr_cv_init(&poll_cv); |
||||
|
||||
grpc_iomgr_platform_init(); |
||||
test_many_fds(); |
||||
grpc_iomgr_platform_shutdown(); |
||||
|
||||
grpc_iomgr_platform_init(); |
||||
test_poll_cv_trigger(); |
||||
grpc_iomgr_platform_shutdown(); |
||||
return 0; |
||||
} |
||||
Loading…
Reference in new issue