mirror of https://github.com/grpc/grpc.git
Craig Tiller
9 years ago
parent
0a8a0176a0
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d422e32847
9 changed files with 21 additions and 211 deletions
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/*
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* |
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* Copyright 2015-2016, 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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#ifndef GRPC_INTERNAL_CORE_IOMGR_POLLSET_POSIX_H |
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#define GRPC_INTERNAL_CORE_IOMGR_POLLSET_POSIX_H |
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#include <poll.h> |
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#include <grpc/support/sync.h> |
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#include "src/core/iomgr/exec_ctx.h" |
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#include "src/core/iomgr/iomgr.h" |
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#include "src/core/iomgr/pollset.h" |
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#include "src/core/iomgr/wakeup_fd_posix.h" |
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typedef struct grpc_pollset_vtable grpc_pollset_vtable; |
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/* forward declare only in this file to avoid leaking impl details via
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pollset.h; real users of grpc_fd should always include 'fd_posix.h' and not |
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use the struct tag */ |
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struct grpc_fd; |
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typedef struct grpc_cached_wakeup_fd { |
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grpc_wakeup_fd fd; |
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struct grpc_cached_wakeup_fd *next; |
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} grpc_cached_wakeup_fd; |
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struct grpc_pollset_worker { |
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grpc_cached_wakeup_fd *wakeup_fd; |
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int reevaluate_polling_on_wakeup; |
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int kicked_specifically; |
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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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/* pollsets under posix can mutate representation as fds are added and
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removed. |
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For example, we may choose a poll() based implementation on linux for |
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few fds, and an epoll() based implementation for many fds */ |
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const grpc_pollset_vtable *vtable; |
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gpr_mu *mu; |
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grpc_pollset_worker root_worker; |
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int in_flight_cbs; |
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int shutting_down; |
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int called_shutdown; |
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int kicked_without_pollers; |
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grpc_closure *shutdown_done; |
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grpc_closure_list idle_jobs; |
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union { |
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int fd; |
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void *ptr; |
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} data; |
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/* Local cache of eventfds for workers */ |
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grpc_cached_wakeup_fd *local_wakeup_cache; |
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}; |
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struct grpc_pollset_vtable { |
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void (*add_fd)(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset, |
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struct grpc_fd *fd, int and_unlock_pollset); |
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void (*maybe_work_and_unlock)(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset, |
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grpc_pollset_worker *worker, |
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gpr_timespec deadline, gpr_timespec now); |
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void (*finish_shutdown)(grpc_pollset *pollset); |
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void (*destroy)(grpc_pollset *pollset); |
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}; |
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/* Add an fd to a pollset */ |
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void grpc_pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset, |
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struct grpc_fd *fd); |
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/* Returns the fd to listen on for kicks */ |
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int grpc_kick_read_fd(grpc_pollset *p); |
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/* Call after polling has been kicked to leave the kicked state */ |
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void grpc_kick_drain(grpc_pollset *p); |
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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 |
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non-blocking 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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int grpc_poll_deadline_to_millis_timeout(gpr_timespec deadline, |
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gpr_timespec now); |
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/* Allow kick to wakeup the currently polling worker */ |
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#define GRPC_POLLSET_CAN_KICK_SELF 1 |
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/* Force the wakee to repoll when awoken */ |
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#define GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP 2 |
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/* As per grpc_pollset_kick, with an extended set of flags (defined above)
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-- mostly for fd_posix's use. */ |
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void grpc_pollset_kick_ext(grpc_pollset *p, |
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grpc_pollset_worker *specific_worker, |
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uint32_t flags); |
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/* turn a pollset into a multipoller: platform specific */ |
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typedef void (*grpc_platform_become_multipoller_type)(grpc_exec_ctx *exec_ctx, |
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grpc_pollset *pollset, |
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struct grpc_fd **fds, |
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size_t fd_count); |
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extern grpc_platform_become_multipoller_type grpc_platform_become_multipoller; |
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void grpc_poll_become_multipoller(grpc_exec_ctx *exec_ctx, |
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grpc_pollset *pollset, struct grpc_fd **fds, |
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size_t fd_count); |
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/* Return 1 if the pollset has active threads in grpc_pollset_work (pollset must
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* be locked) */ |
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int grpc_pollset_has_workers(grpc_pollset *pollset); |
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void grpc_remove_fd_from_all_epoll_sets(int fd); |
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/* override to allow tests to hook poll() usage */ |
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/* NOTE: Any changes to grpc_poll_function must take place when the gRPC
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is certainly not doing any polling anywhere. |
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Otherwise, there might be a race between changing the variable and actually |
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doing a polling operation */ |
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typedef int (*grpc_poll_function_type)(struct pollfd *, nfds_t, int); |
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extern grpc_poll_function_type grpc_poll_function; |
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extern grpc_wakeup_fd grpc_global_wakeup_fd; |
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#endif /* GRPC_INTERNAL_CORE_IOMGR_POLLSET_POSIX_H */ |
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@ -1,45 +0,0 @@ |
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/*
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* |
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* Copyright 2015-2016, 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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#ifndef GRPC_INTERNAL_CORE_IOMGR_POLLSET_SET_POSIX_H |
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#define GRPC_INTERNAL_CORE_IOMGR_POLLSET_SET_POSIX_H |
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#include <grpc/support/sync.h> |
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#include "src/core/iomgr/ev_posix.h" |
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void grpc_pollset_set_add_fd(grpc_exec_ctx *exec_ctx, |
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grpc_pollset_set *pollset_set, grpc_fd *fd); |
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void grpc_pollset_set_del_fd(grpc_exec_ctx *exec_ctx, |
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grpc_pollset_set *pollset_set, grpc_fd *fd); |
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#endif /* GRPC_INTERNAL_CORE_IOMGR_POLLSET_WINDOWS_H */ |
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