mirror of https://github.com/grpc/grpc.git
Craig Tiller
8 years ago
parent
ac1facd2d6
commit
dd86b69b8b
3 changed files with 679 additions and 0 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 "src/core/lib/iomgr/port.h" |
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/* This polling engine is only relevant on linux kernels supporting epoll() */ |
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#ifdef GRPC_LINUX_EPOLL |
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#include "src/core/lib/iomgr/ev_epoll_linux.h" |
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#include <assert.h> |
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#include <errno.h> |
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#include <poll.h> |
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#include <pthread.h> |
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#include <string.h> |
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#include <sys/epoll.h> |
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#include <sys/socket.h> |
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#include <unistd.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/string_util.h> |
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#include <grpc/support/tls.h> |
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#include <grpc/support/useful.h> |
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#include "src/core/lib/iomgr/ev_posix.h" |
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#include "src/core/lib/iomgr/iomgr_internal.h" |
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#include "src/core/lib/iomgr/lockfree_event.h" |
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#include "src/core/lib/iomgr/timer.h" |
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#include "src/core/lib/iomgr/wakeup_fd_posix.h" |
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#include "src/core/lib/iomgr/workqueue.h" |
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#include "src/core/lib/profiling/timers.h" |
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#include "src/core/lib/support/block_annotate.h" |
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/* Uncomment the following to enable extra checks on poll_object operations */ |
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/* #define PO_DEBUG */ |
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/* TODO: sreek: Right now, this wakes up all pollers. In future we should make
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* sure to wake up one polling thread (which can wake up other threads if |
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* needed) */ |
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static grpc_wakeup_fd global_wakeup_fd; |
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/*******************************************************************************
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* Fd Declarations |
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*/ |
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#define FD_FROM_PO(po) ((grpc_fd *)(po)) |
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struct grpc_fd { |
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gpr_mu mu; |
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int fd; |
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/* refst format:
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bit 0 : 1=Active / 0=Orphaned |
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bits 1-n : refcount |
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Ref/Unref by two to avoid altering the orphaned bit */ |
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gpr_atm refst; |
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/* The fd is either closed or we relinquished control of it. In either
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cases, this indicates that the 'fd' on this structure is no longer |
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valid */ |
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bool orphaned; |
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gpr_atm read_closure; |
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gpr_atm write_closure; |
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struct grpc_fd *freelist_next; |
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grpc_closure *on_done_closure; |
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/* The pollset that last noticed that the fd is readable. The actual type
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* stored in this is (grpc_pollset *) */ |
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gpr_atm read_notifier_pollset; |
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grpc_iomgr_object iomgr_object; |
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}; |
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/* Reference counting for fds */ |
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// #define GRPC_FD_REF_COUNT_DEBUG
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#ifdef GRPC_FD_REF_COUNT_DEBUG |
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static void fd_ref(grpc_fd *fd, const char *reason, const char *file, int line); |
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static void fd_unref(grpc_fd *fd, const char *reason, const char *file, |
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int line); |
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#define GRPC_FD_REF(fd, reason) fd_ref(fd, reason, __FILE__, __LINE__) |
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#define GRPC_FD_UNREF(fd, reason) fd_unref(fd, reason, __FILE__, __LINE__) |
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#else |
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static void fd_ref(grpc_fd *fd); |
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static void fd_unref(grpc_fd *fd); |
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#define GRPC_FD_REF(fd, reason) fd_ref(fd) |
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#define GRPC_FD_UNREF(fd, reason) fd_unref(fd) |
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#endif |
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static void fd_global_init(void); |
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static void fd_global_shutdown(void); |
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static void workqueue_enqueue(grpc_exec_ctx *exec_ctx, grpc_closure *closure, |
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grpc_error *error); |
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static const grpc_closure_scheduler_vtable workqueue_scheduler_vtable = { |
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workqueue_enqueue, workqueue_enqueue, "workqueue"}; |
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/*******************************************************************************
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* Pollset Declarations |
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*/ |
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struct grpc_pollset_worker { |
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/* Thread id of this worker */ |
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pthread_t pt_id; |
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/* Used to prevent a worker from getting kicked multiple times */ |
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gpr_atm is_kicked; |
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struct grpc_pollset_worker *next; |
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struct grpc_pollset_worker *prev; |
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}; |
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struct grpc_pollset {}; |
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/*******************************************************************************
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* Pollset-set Declarations |
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*/ |
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struct grpc_pollset_set {}; |
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/*******************************************************************************
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* Common helpers |
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*/ |
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#ifdef GRPC_WORKQUEUE_REFCOUNT_DEBUG |
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static grpc_workqueue *workqueue_ref(grpc_workqueue *workqueue, |
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const char *file, int line, |
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const char *reason) { |
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if (workqueue != NULL) { |
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abort(); |
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} |
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return workqueue; |
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} |
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static void workqueue_unref(grpc_exec_ctx *exec_ctx, grpc_workqueue *workqueue, |
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const char *file, int line, const char *reason) { |
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if (workqueue != NULL) { |
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abort(); |
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} |
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} |
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#else |
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static grpc_workqueue *workqueue_ref(grpc_workqueue *workqueue) { |
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if (workqueue != NULL) { |
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abort(); |
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} |
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return workqueue; |
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} |
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static void workqueue_unref(grpc_exec_ctx *exec_ctx, |
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grpc_workqueue *workqueue) { |
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if (workqueue != NULL) { |
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abort(); |
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} |
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} |
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#endif |
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static void workqueue_enqueue(grpc_exec_ctx *exec_ctx, grpc_closure *closure, |
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grpc_error *error) { |
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GPR_TIMER_BEGIN("workqueue.enqueue", 0); |
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// grpc_workqueue *workqueue = (grpc_workqueue *)closure->scheduler;
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abort(); |
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} |
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static grpc_closure_scheduler *workqueue_scheduler(grpc_workqueue *workqueue) { |
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abort(); |
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} |
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/*******************************************************************************
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* Fd Definitions |
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*/ |
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/* We need to keep a freelist not because of any concerns of malloc performance
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* but instead so that implementations with multiple threads in (for example) |
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* epoll_wait deal with the race between pollset removal and incoming poll |
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* notifications. |
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* |
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* The problem is that the poller ultimately holds a reference to this |
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* object, so it is very difficult to know when is safe to free it, at least |
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* without some expensive synchronization. |
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* |
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* If we keep the object freelisted, in the worst case losing this race just |
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* becomes a spurious read notification on a reused fd. |
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*/ |
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/* The alarm system needs to be able to wakeup 'some poller' sometimes
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* (specifically when a new alarm needs to be triggered earlier than the next |
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* alarm 'epoch'). This wakeup_fd gives us something to alert on when such a |
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* case occurs. */ |
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static grpc_fd *fd_freelist = NULL; |
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static gpr_mu fd_freelist_mu; |
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#ifdef GRPC_FD_REF_COUNT_DEBUG |
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#define REF_BY(fd, n, reason) ref_by(fd, n, reason, __FILE__, __LINE__) |
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#define UNREF_BY(fd, n, reason) unref_by(fd, n, reason, __FILE__, __LINE__) |
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static void ref_by(grpc_fd *fd, int n, const char *reason, const char *file, |
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int line) { |
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gpr_log(GPR_DEBUG, "FD %d %p ref %d %ld -> %ld [%s; %s:%d]", fd->fd, |
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(void *)fd, n, gpr_atm_no_barrier_load(&fd->refst), |
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gpr_atm_no_barrier_load(&fd->refst) + n, reason, file, line); |
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#else |
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#define REF_BY(fd, n, reason) ref_by(fd, n) |
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#define UNREF_BY(fd, n, reason) unref_by(fd, n) |
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static void ref_by(grpc_fd *fd, int n) { |
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#endif |
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GPR_ASSERT(gpr_atm_no_barrier_fetch_add(&fd->refst, n) > 0); |
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} |
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#ifdef GRPC_FD_REF_COUNT_DEBUG |
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static void unref_by(grpc_fd *fd, int n, const char *reason, const char *file, |
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int line) { |
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gpr_atm old; |
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gpr_log(GPR_DEBUG, "FD %d %p unref %d %ld -> %ld [%s; %s:%d]", fd->fd, |
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(void *)fd, n, gpr_atm_no_barrier_load(&fd->refst), |
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gpr_atm_no_barrier_load(&fd->refst) - n, reason, file, line); |
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#else |
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static void unref_by(grpc_fd *fd, int n) { |
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gpr_atm old; |
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#endif |
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old = gpr_atm_full_fetch_add(&fd->refst, -n); |
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if (old == n) { |
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/* Add the fd to the freelist */ |
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gpr_mu_lock(&fd_freelist_mu); |
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fd->freelist_next = fd_freelist; |
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fd_freelist = fd; |
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grpc_iomgr_unregister_object(&fd->iomgr_object); |
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grpc_lfev_destroy(&fd->read_closure); |
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grpc_lfev_destroy(&fd->write_closure); |
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gpr_mu_unlock(&fd_freelist_mu); |
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} else { |
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GPR_ASSERT(old > n); |
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} |
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} |
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static void fd_global_init(void) { gpr_mu_init(&fd_freelist_mu); } |
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static void fd_global_shutdown(void) { |
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gpr_mu_lock(&fd_freelist_mu); |
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gpr_mu_unlock(&fd_freelist_mu); |
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while (fd_freelist != NULL) { |
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grpc_fd *fd = fd_freelist; |
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fd_freelist = fd_freelist->freelist_next; |
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gpr_mu_destroy(&fd->mu); |
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gpr_free(fd); |
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} |
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gpr_mu_destroy(&fd_freelist_mu); |
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} |
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static grpc_fd *fd_create(int fd, const char *name) { |
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grpc_fd *new_fd = NULL; |
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gpr_mu_lock(&fd_freelist_mu); |
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if (fd_freelist != NULL) { |
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new_fd = fd_freelist; |
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fd_freelist = fd_freelist->freelist_next; |
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} |
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gpr_mu_unlock(&fd_freelist_mu); |
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if (new_fd == NULL) { |
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new_fd = gpr_malloc(sizeof(grpc_fd)); |
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gpr_mu_init(&new_fd->mu); |
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} |
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/* Note: It is not really needed to get the new_fd->mu lock here. If this
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* is a newly created fd (or an fd we got from the freelist), no one else |
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* would be holding a lock to it anyway. */ |
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gpr_mu_lock(&new_fd->mu); |
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gpr_atm_rel_store(&new_fd->refst, (gpr_atm)1); |
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new_fd->fd = fd; |
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new_fd->orphaned = false; |
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grpc_lfev_init(&new_fd->read_closure); |
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grpc_lfev_init(&new_fd->write_closure); |
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gpr_atm_no_barrier_store(&new_fd->read_notifier_pollset, (gpr_atm)NULL); |
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new_fd->freelist_next = NULL; |
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new_fd->on_done_closure = NULL; |
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gpr_mu_unlock(&new_fd->mu); |
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char *fd_name; |
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gpr_asprintf(&fd_name, "%s fd=%d", name, fd); |
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grpc_iomgr_register_object(&new_fd->iomgr_object, fd_name); |
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#ifdef GRPC_FD_REF_COUNT_DEBUG |
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gpr_log(GPR_DEBUG, "FD %d %p create %s", fd, (void *)new_fd, fd_name); |
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#endif |
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gpr_free(fd_name); |
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return new_fd; |
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} |
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static int fd_wrapped_fd(grpc_fd *fd) { |
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int ret_fd = -1; |
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gpr_mu_lock(&fd->mu); |
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if (!fd->orphaned) { |
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ret_fd = fd->fd; |
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} |
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gpr_mu_unlock(&fd->mu); |
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return ret_fd; |
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} |
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static void fd_orphan(grpc_exec_ctx *exec_ctx, grpc_fd *fd, |
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grpc_closure *on_done, int *release_fd, |
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const char *reason) { |
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bool is_fd_closed = false; |
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grpc_error *error = GRPC_ERROR_NONE; |
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gpr_mu_lock(&fd->mu); |
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fd->on_done_closure = on_done; |
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/* If release_fd is not NULL, we should be relinquishing control of the file
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descriptor fd->fd (but we still own the grpc_fd structure). */ |
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if (release_fd != NULL) { |
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*release_fd = fd->fd; |
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} else { |
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close(fd->fd); |
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is_fd_closed = true; |
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} |
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fd->orphaned = true; |
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/* Remove the active status but keep referenced. We want this grpc_fd struct
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to be alive (and not added to freelist) until the end of this function */ |
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REF_BY(fd, 1, reason); |
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grpc_closure_sched(exec_ctx, fd->on_done_closure, GRPC_ERROR_REF(error)); |
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gpr_mu_unlock(&fd->mu); |
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UNREF_BY(fd, 2, reason); /* Drop the reference */ |
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GRPC_LOG_IF_ERROR("fd_orphan", GRPC_ERROR_REF(error)); |
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GRPC_ERROR_UNREF(error); |
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} |
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static grpc_pollset *fd_get_read_notifier_pollset(grpc_exec_ctx *exec_ctx, |
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grpc_fd *fd) { |
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gpr_atm notifier = gpr_atm_acq_load(&fd->read_notifier_pollset); |
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return (grpc_pollset *)notifier; |
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} |
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static bool fd_is_shutdown(grpc_fd *fd) { |
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return grpc_lfev_is_shutdown(&fd->read_closure); |
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} |
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/* Might be called multiple times */ |
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static void fd_shutdown(grpc_exec_ctx *exec_ctx, grpc_fd *fd, grpc_error *why) { |
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if (grpc_lfev_set_shutdown(exec_ctx, &fd->read_closure, |
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GRPC_ERROR_REF(why))) { |
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shutdown(fd->fd, SHUT_RDWR); |
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grpc_lfev_set_shutdown(exec_ctx, &fd->write_closure, GRPC_ERROR_REF(why)); |
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} |
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GRPC_ERROR_UNREF(why); |
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} |
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static void fd_notify_on_read(grpc_exec_ctx *exec_ctx, grpc_fd *fd, |
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grpc_closure *closure) { |
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grpc_lfev_notify_on(exec_ctx, &fd->read_closure, closure); |
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} |
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static void fd_notify_on_write(grpc_exec_ctx *exec_ctx, grpc_fd *fd, |
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grpc_closure *closure) { |
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grpc_lfev_notify_on(exec_ctx, &fd->write_closure, closure); |
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} |
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static grpc_workqueue *fd_get_workqueue(grpc_fd *fd) { abort(); } |
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/*******************************************************************************
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* Pollset Definitions |
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*/ |
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GPR_TLS_DECL(g_current_thread_pollset); |
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GPR_TLS_DECL(g_current_thread_worker); |
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static void poller_kick_init() {} |
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/* Global state management */ |
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static grpc_error *pollset_global_init(void) { |
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gpr_tls_init(&g_current_thread_pollset); |
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gpr_tls_init(&g_current_thread_worker); |
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poller_kick_init(); |
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return grpc_wakeup_fd_init(&global_wakeup_fd); |
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} |
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static void pollset_global_shutdown(void) { |
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grpc_wakeup_fd_destroy(&global_wakeup_fd); |
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gpr_tls_destroy(&g_current_thread_pollset); |
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gpr_tls_destroy(&g_current_thread_worker); |
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} |
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/* p->mu must be held before calling this function */ |
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static grpc_error *pollset_kick(grpc_pollset *p, |
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grpc_pollset_worker *specific_worker) { |
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abort(); |
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} |
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static grpc_error *kick_poller(void) { abort(); } |
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static void pollset_init(grpc_pollset *pollset, gpr_mu **mu) {} |
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/* Convert a timespec to milliseconds:
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- Very small or negative poll times are clamped to zero to do a non-blocking |
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poll (which becomes spin polling) |
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- Other small values are rounded up to one millisecond |
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- Longer than a millisecond polls are rounded up to the next nearest |
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millisecond to avoid spinning |
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- Infinite timeouts are converted to -1 */ |
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static int poll_deadline_to_millis_timeout(gpr_timespec deadline, |
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gpr_timespec now) { |
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gpr_timespec timeout; |
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static const int64_t max_spin_polling_us = 10; |
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if (gpr_time_cmp(deadline, gpr_inf_future(deadline.clock_type)) == 0) { |
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return -1; |
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} |
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if (gpr_time_cmp(deadline, gpr_time_add(now, gpr_time_from_micros( |
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max_spin_polling_us, |
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GPR_TIMESPAN))) <= 0) { |
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return 0; |
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} |
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timeout = gpr_time_sub(deadline, now); |
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int millis = gpr_time_to_millis(gpr_time_add( |
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timeout, gpr_time_from_nanos(GPR_NS_PER_MS - 1, GPR_TIMESPAN))); |
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return millis >= 1 ? millis : 1; |
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} |
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static void fd_become_readable(grpc_exec_ctx *exec_ctx, grpc_fd *fd, |
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grpc_pollset *notifier) { |
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grpc_lfev_set_ready(exec_ctx, &fd->read_closure); |
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/* Note, it is possible that fd_become_readable might be called twice with
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different 'notifier's when an fd becomes readable and it is in two epoll |
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sets (This can happen briefly during polling island merges). In such cases |
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it does not really matter which notifer is set as the read_notifier_pollset |
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(They would both point to the same polling island anyway) */ |
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/* Use release store to match with acquire load in fd_get_read_notifier */ |
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gpr_atm_rel_store(&fd->read_notifier_pollset, (gpr_atm)notifier); |
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} |
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static void fd_become_writable(grpc_exec_ctx *exec_ctx, grpc_fd *fd) { |
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grpc_lfev_set_ready(exec_ctx, &fd->write_closure); |
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} |
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static void finish_shutdown_locked(grpc_exec_ctx *exec_ctx, |
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grpc_pollset *pollset) { |
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abort(); |
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} |
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/* pollset->po.mu lock must be held by the caller before calling this */ |
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static void pollset_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset, |
||||
grpc_closure *closure) {} |
||||
|
||||
/* pollset_shutdown is guaranteed to be called before pollset_destroy. So other
|
||||
* than destroying the mutexes, there is nothing special that needs to be done |
||||
* here */ |
||||
static void pollset_destroy(grpc_pollset *pollset) {} |
||||
|
||||
/* pollset->po.mu lock must be held by the caller before calling this.
|
||||
The function pollset_work() may temporarily release the lock (pollset->po.mu) |
||||
during the course of its execution but it will always re-acquire the lock and |
||||
ensure that it is held by the time the function returns */ |
||||
static grpc_error *pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset, |
||||
grpc_pollset_worker **worker_hdl, |
||||
gpr_timespec now, gpr_timespec deadline) { |
||||
abort(); |
||||
} |
||||
|
||||
static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset, |
||||
grpc_fd *fd) { |
||||
abort(); |
||||
} |
||||
|
||||
/*******************************************************************************
|
||||
* Pollset-set Definitions |
||||
*/ |
||||
|
||||
static grpc_pollset_set *pollset_set_create(void) { |
||||
grpc_pollset_set *pss = gpr_malloc(sizeof(*pss)); |
||||
return pss; |
||||
} |
||||
|
||||
static void pollset_set_destroy(grpc_exec_ctx *exec_ctx, |
||||
grpc_pollset_set *pss) { |
||||
gpr_free(pss); |
||||
} |
||||
|
||||
static void pollset_set_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset_set *pss, |
||||
grpc_fd *fd) { |
||||
abort(); |
||||
} |
||||
|
||||
static void pollset_set_del_fd(grpc_exec_ctx *exec_ctx, grpc_pollset_set *pss, |
||||
grpc_fd *fd) { |
||||
abort(); |
||||
} |
||||
|
||||
static void pollset_set_add_pollset(grpc_exec_ctx *exec_ctx, |
||||
grpc_pollset_set *pss, grpc_pollset *ps) { |
||||
abort(); |
||||
} |
||||
|
||||
static void pollset_set_del_pollset(grpc_exec_ctx *exec_ctx, |
||||
grpc_pollset_set *pss, grpc_pollset *ps) { |
||||
abort(); |
||||
} |
||||
|
||||
static void pollset_set_add_pollset_set(grpc_exec_ctx *exec_ctx, |
||||
grpc_pollset_set *bag, |
||||
grpc_pollset_set *item) { |
||||
abort(); |
||||
} |
||||
|
||||
static void pollset_set_del_pollset_set(grpc_exec_ctx *exec_ctx, |
||||
grpc_pollset_set *bag, |
||||
grpc_pollset_set *item) { |
||||
abort(); |
||||
} |
||||
|
||||
/*******************************************************************************
|
||||
* Event engine binding |
||||
*/ |
||||
|
||||
static void shutdown_engine(void) { |
||||
fd_global_shutdown(); |
||||
pollset_global_shutdown(); |
||||
} |
||||
|
||||
static const grpc_event_engine_vtable vtable = { |
||||
.pollset_size = sizeof(grpc_pollset), |
||||
|
||||
.fd_create = fd_create, |
||||
.fd_wrapped_fd = fd_wrapped_fd, |
||||
.fd_orphan = fd_orphan, |
||||
.fd_shutdown = fd_shutdown, |
||||
.fd_is_shutdown = fd_is_shutdown, |
||||
.fd_notify_on_read = fd_notify_on_read, |
||||
.fd_notify_on_write = fd_notify_on_write, |
||||
.fd_get_read_notifier_pollset = fd_get_read_notifier_pollset, |
||||
.fd_get_workqueue = fd_get_workqueue, |
||||
|
||||
.pollset_init = pollset_init, |
||||
.pollset_shutdown = pollset_shutdown, |
||||
.pollset_destroy = pollset_destroy, |
||||
.pollset_work = pollset_work, |
||||
.pollset_kick = pollset_kick, |
||||
.pollset_add_fd = pollset_add_fd, |
||||
|
||||
.pollset_set_create = pollset_set_create, |
||||
.pollset_set_destroy = pollset_set_destroy, |
||||
.pollset_set_add_pollset = pollset_set_add_pollset, |
||||
.pollset_set_del_pollset = pollset_set_del_pollset, |
||||
.pollset_set_add_pollset_set = pollset_set_add_pollset_set, |
||||
.pollset_set_del_pollset_set = pollset_set_del_pollset_set, |
||||
.pollset_set_add_fd = pollset_set_add_fd, |
||||
.pollset_set_del_fd = pollset_set_del_fd, |
||||
|
||||
.kick_poller = kick_poller, |
||||
|
||||
.workqueue_ref = workqueue_ref, |
||||
.workqueue_unref = workqueue_unref, |
||||
.workqueue_scheduler = workqueue_scheduler, |
||||
|
||||
.shutdown_engine = shutdown_engine, |
||||
}; |
||||
|
||||
/* It is possible that GLIBC has epoll but the underlying kernel doesn't.
|
||||
* Create a dummy epoll_fd to make sure epoll support is available */ |
||||
static bool is_epollex_available() { |
||||
int fd = epoll_create1(EPOLL_CLOEXEC); |
||||
if (fd < 0) { |
||||
gpr_log( |
||||
GPR_ERROR, |
||||
"epoll_create1 failed with error: %d. Not using epoll polling engine", |
||||
fd); |
||||
return false; |
||||
} |
||||
close(fd); |
||||
return true; |
||||
} |
||||
|
||||
const grpc_event_engine_vtable *grpc_init_epollex_linux(void) { |
||||
if (!grpc_has_wakeup_fd()) { |
||||
return NULL; |
||||
} |
||||
|
||||
if (!is_epollex_available()) { |
||||
return NULL; |
||||
} |
||||
|
||||
fd_global_init(); |
||||
|
||||
if (!GRPC_LOG_IF_ERROR("pollset_global_init", pollset_global_init())) { |
||||
return NULL; |
||||
} |
||||
|
||||
return &vtable; |
||||
} |
||||
|
||||
#else /* defined(GRPC_LINUX_EPOLL) */ |
||||
#if defined(GRPC_POSIX_SOCKET) |
||||
#include "src/core/lib/iomgr/ev_posix.h" |
||||
/* If GRPC_LINUX_EPOLL is not defined, it means epoll is not available. Return
|
||||
* NULL */ |
||||
const grpc_event_engine_vtable *grpc_init_epoll_linux(void) { return NULL; } |
||||
#endif /* defined(GRPC_POSIX_SOCKET) */ |
||||
|
||||
#endif /* !defined(GRPC_LINUX_EPOLL) */ |
||||
@ -0,0 +1,42 @@ |
||||
/*
|
||||
* |
||||
* Copyright 2015, 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. |
||||
* |
||||
*/ |
||||
|
||||
#ifndef GRPC_CORE_LIB_IOMGR_EV_EPOLLEX_LINUX_H |
||||
#define GRPC_CORE_LIB_IOMGR_EV_EPOLLEX_LINUX_H |
||||
|
||||
#include "src/core/lib/iomgr/ev_posix.h" |
||||
#include "src/core/lib/iomgr/port.h" |
||||
|
||||
const grpc_event_engine_vtable *grpc_init_epollex_linux(void); |
||||
|
||||
#endif /* GRPC_CORE_LIB_IOMGR_EV_EPOLLEX_LINUX_H */ |
||||
Loading…
Reference in new issue