Craig Tiller | f2d39b7 | 2015-01-21 15:06:08 -0800 | [diff] [blame] | 1 | /* |
| 2 | * |
Craig Tiller | 0605995 | 2015-02-18 08:34:56 -0800 | [diff] [blame] | 3 | * Copyright 2015, Google Inc. |
Craig Tiller | f2d39b7 | 2015-01-21 15:06:08 -0800 | [diff] [blame] | 4 | * All rights reserved. |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions are |
| 8 | * met: |
| 9 | * |
| 10 | * * Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * * Redistributions in binary form must reproduce the above |
| 13 | * copyright notice, this list of conditions and the following disclaimer |
| 14 | * in the documentation and/or other materials provided with the |
| 15 | * distribution. |
| 16 | * * Neither the name of Google Inc. nor the names of its |
| 17 | * contributors may be used to endorse or promote products derived from |
| 18 | * this software without specific prior written permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 21 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 22 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 23 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 24 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 25 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 26 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 27 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 28 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 29 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 30 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 31 | * |
| 32 | */ |
| 33 | |
Craig Tiller | d14a1a5 | 2015-01-21 15:26:29 -0800 | [diff] [blame] | 34 | #include <grpc/support/port_platform.h> |
Craig Tiller | f2d39b7 | 2015-01-21 15:06:08 -0800 | [diff] [blame] | 35 | |
Nicolas "Pixel" Noble | 21f627a | 2015-02-04 01:31:14 +0100 | [diff] [blame] | 36 | #ifdef GPR_WINSOCK_SOCKET |
Craig Tiller | f2d39b7 | 2015-01-21 15:06:08 -0800 | [diff] [blame] | 37 | |
Nicolas "Pixel" Noble | 21f627a | 2015-02-04 01:31:14 +0100 | [diff] [blame] | 38 | #include <grpc/support/thd.h> |
| 39 | |
| 40 | #include "src/core/iomgr/alarm_internal.h" |
Nicolas "Pixel" Noble | 21f627a | 2015-02-04 01:31:14 +0100 | [diff] [blame] | 41 | #include "src/core/iomgr/iomgr_internal.h" |
Nicolas "Pixel" Noble | fcb16e1 | 2015-06-24 23:45:30 +0200 | [diff] [blame] | 42 | #include "src/core/iomgr/pollset.h" |
Nicolas "Pixel" Noble | 21f627a | 2015-02-04 01:31:14 +0100 | [diff] [blame] | 43 | #include "src/core/iomgr/pollset_windows.h" |
| 44 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 45 | static void remove_worker(grpc_pollset *p, grpc_pollset_worker *worker) { |
Craig Tiller | d1885e0 | 2015-07-30 14:32:31 -0700 | [diff] [blame] | 46 | worker->prev->next = worker->next; |
| 47 | worker->next->prev = worker->prev; |
| 48 | } |
| 49 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 50 | static int has_workers(grpc_pollset *p) { |
Craig Tiller | d1885e0 | 2015-07-30 14:32:31 -0700 | [diff] [blame] | 51 | return p->root_worker.next != &p->root_worker; |
| 52 | } |
| 53 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 54 | static grpc_pollset_worker *pop_front_worker(grpc_pollset *p) { |
| 55 | if (has_workers(p)) { |
| 56 | grpc_pollset_worker *w = p->root_worker.next; |
| 57 | remove_worker(p, w); |
| 58 | return w; |
| 59 | } else { |
| 60 | return NULL; |
| 61 | } |
Craig Tiller | d1885e0 | 2015-07-30 14:32:31 -0700 | [diff] [blame] | 62 | } |
| 63 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 64 | static void push_back_worker(grpc_pollset *p, grpc_pollset_worker *worker) { |
Craig Tiller | d1885e0 | 2015-07-30 14:32:31 -0700 | [diff] [blame] | 65 | worker->next = &p->root_worker; |
| 66 | worker->prev = worker->next->prev; |
| 67 | worker->prev->next = worker->next->prev = worker; |
| 68 | } |
| 69 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 70 | static void push_front_worker(grpc_pollset *p, grpc_pollset_worker *worker) { |
Craig Tiller | d1885e0 | 2015-07-30 14:32:31 -0700 | [diff] [blame] | 71 | worker->prev = &p->root_worker; |
| 72 | worker->next = worker->prev->next; |
| 73 | worker->prev->next = worker->next->prev = worker; |
| 74 | } |
| 75 | |
Nicolas "Pixel" Noble | 0f981e9 | 2015-05-03 10:40:56 +0200 | [diff] [blame] | 76 | /* There isn't really any such thing as a pollset under Windows, due to the |
| 77 | nature of the IO completion ports. We're still going to provide a minimal |
| 78 | set of features for the sake of the rest of grpc. But grpc_pollset_work |
| 79 | won't actually do any polling, and return as quickly as possible. */ |
| 80 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 81 | void grpc_pollset_init(grpc_pollset *pollset) { |
| 82 | memset(pollset, 0, sizeof(*pollset)); |
| 83 | gpr_mu_init(&pollset->mu); |
Craig Tiller | d1885e0 | 2015-07-30 14:32:31 -0700 | [diff] [blame] | 84 | pollset->root_worker.next = pollset->root_worker.prev = &pollset->root_worker; |
| 85 | pollset->kicked_without_pollers = 0; |
Nicolas Noble | a14ebbb | 2015-06-22 14:17:34 -0700 | [diff] [blame] | 86 | } |
Nicolas "Pixel" Noble | 21f627a | 2015-02-04 01:31:14 +0100 | [diff] [blame] | 87 | |
Craig Tiller | 82f9bd8 | 2015-09-23 09:31:51 -0700 | [diff] [blame] | 88 | void grpc_pollset_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset, |
| 89 | grpc_closure *closure) { |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 90 | gpr_mu_lock(&pollset->mu); |
Nicolas "Pixel" Noble | 857d250 | 2015-06-25 21:58:18 +0200 | [diff] [blame] | 91 | pollset->shutting_down = 1; |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 92 | grpc_pollset_kick(pollset, GRPC_POLLSET_KICK_BROADCAST); |
| 93 | gpr_mu_unlock(&pollset->mu); |
Craig Tiller | 82f9bd8 | 2015-09-23 09:31:51 -0700 | [diff] [blame] | 94 | grpc_exec_ctx_enqueue(exec_ctx, closure, 1); |
David Klempner | b505661 | 2015-02-24 14:22:50 -0800 | [diff] [blame] | 95 | } |
| 96 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 97 | void grpc_pollset_destroy(grpc_pollset *pollset) { |
| 98 | gpr_mu_destroy(&pollset->mu); |
Nicolas "Pixel" Noble | 21f627a | 2015-02-04 01:31:14 +0100 | [diff] [blame] | 99 | } |
| 100 | |
Craig Tiller | 82f9bd8 | 2015-09-23 09:31:51 -0700 | [diff] [blame] | 101 | void grpc_pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset, |
| 102 | grpc_pollset_worker *worker, |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 103 | gpr_timespec now, gpr_timespec deadline) { |
Craig Tiller | d1885e0 | 2015-07-30 14:32:31 -0700 | [diff] [blame] | 104 | int added_worker = 0; |
Craig Tiller | d1885e0 | 2015-07-30 14:32:31 -0700 | [diff] [blame] | 105 | worker->next = worker->prev = NULL; |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 106 | gpr_cv_init(&worker->cv); |
Craig Tiller | 82f9bd8 | 2015-09-23 09:31:51 -0700 | [diff] [blame] | 107 | if (grpc_alarm_check(exec_ctx, now, &deadline)) { |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 108 | goto done; |
| 109 | } |
| 110 | if (!pollset->kicked_without_pollers && !pollset->shutting_down) { |
| 111 | push_front_worker(pollset, worker); |
| 112 | added_worker = 1; |
| 113 | gpr_cv_wait(&worker->cv, &pollset->mu, deadline); |
| 114 | } else { |
| 115 | pollset->kicked_without_pollers = 0; |
| 116 | } |
Craig Tiller | d1885e0 | 2015-07-30 14:32:31 -0700 | [diff] [blame] | 117 | done: |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 118 | gpr_cv_destroy(&worker->cv); |
| 119 | if (added_worker) { |
| 120 | remove_worker(pollset, worker); |
| 121 | } |
Nicolas "Pixel" Noble | 21f627a | 2015-02-04 01:31:14 +0100 | [diff] [blame] | 122 | } |
| 123 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 124 | void grpc_pollset_kick(grpc_pollset *p, grpc_pollset_worker *specific_worker) { |
| 125 | if (specific_worker != NULL) { |
| 126 | if (specific_worker == GRPC_POLLSET_KICK_BROADCAST) { |
| 127 | for (specific_worker = p->root_worker.next; |
| 128 | specific_worker != &p->root_worker; |
| 129 | specific_worker = specific_worker->next) { |
| 130 | gpr_cv_signal(&specific_worker->cv); |
| 131 | } |
| 132 | p->kicked_without_pollers = 1; |
| 133 | } else { |
| 134 | gpr_cv_signal(&specific_worker->cv); |
Craig Tiller | d1885e0 | 2015-07-30 14:32:31 -0700 | [diff] [blame] | 135 | } |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 136 | } else { |
| 137 | specific_worker = pop_front_worker(p); |
| 138 | if (specific_worker != NULL) { |
| 139 | push_back_worker(p, specific_worker); |
| 140 | gpr_cv_signal(&specific_worker->cv); |
| 141 | } else { |
| 142 | p->kicked_without_pollers = 1; |
Craig Tiller | d1885e0 | 2015-07-30 14:32:31 -0700 | [diff] [blame] | 143 | } |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 144 | } |
Craig Tiller | d1885e0 | 2015-07-30 14:32:31 -0700 | [diff] [blame] | 145 | } |
Nicolas "Pixel" Noble | 21f627a | 2015-02-04 01:31:14 +0100 | [diff] [blame] | 146 | |
Craig Tiller | 8674cb1 | 2015-06-05 07:09:25 -0700 | [diff] [blame] | 147 | #endif /* GPR_WINSOCK_SOCKET */ |