| /* |
| * |
| * Copyright 2015-2016, 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. |
| * |
| */ |
| |
| /* Win32 code for gpr synchronization support. */ |
| |
| #include <grpc/support/port_platform.h> |
| |
| #ifdef GPR_WIN32 |
| |
| #include <grpc/support/log.h> |
| #include <grpc/support/sync.h> |
| #include <grpc/support/time.h> |
| |
| void gpr_mu_init(gpr_mu *mu) { |
| InitializeCriticalSection(&mu->cs); |
| mu->locked = 0; |
| } |
| |
| void gpr_mu_destroy(gpr_mu *mu) { DeleteCriticalSection(&mu->cs); } |
| |
| void gpr_mu_lock(gpr_mu *mu) { |
| EnterCriticalSection(&mu->cs); |
| GPR_ASSERT(!mu->locked); |
| mu->locked = 1; |
| } |
| |
| void gpr_mu_unlock(gpr_mu *mu) { |
| mu->locked = 0; |
| LeaveCriticalSection(&mu->cs); |
| } |
| |
| int gpr_mu_trylock(gpr_mu *mu) { |
| int result = TryEnterCriticalSection(&mu->cs); |
| if (result) { |
| if (mu->locked) { /* This thread already holds the lock. */ |
| LeaveCriticalSection(&mu->cs); /* Decrement lock count. */ |
| result = 0; /* Indicate failure */ |
| } |
| mu->locked = 1; |
| } |
| return result; |
| } |
| |
| /*----------------------------------------*/ |
| |
| void gpr_cv_init(gpr_cv *cv) { InitializeConditionVariable(cv); } |
| |
| void gpr_cv_destroy(gpr_cv *cv) { |
| /* Condition variables don't need destruction in Win32. */ |
| } |
| |
| int gpr_cv_wait(gpr_cv *cv, gpr_mu *mu, gpr_timespec abs_deadline) { |
| int timeout = 0; |
| DWORD timeout_max_ms; |
| mu->locked = 0; |
| if (gpr_time_cmp(abs_deadline, gpr_inf_future(abs_deadline.clock_type)) == |
| 0) { |
| SleepConditionVariableCS(cv, &mu->cs, INFINITE); |
| } else { |
| abs_deadline = gpr_convert_clock_type(abs_deadline, GPR_CLOCK_REALTIME); |
| gpr_timespec now = gpr_now(abs_deadline.clock_type); |
| int64_t now_ms = (int64_t)now.tv_sec * 1000 + now.tv_nsec / 1000000; |
| int64_t deadline_ms = |
| (int64_t)abs_deadline.tv_sec * 1000 + abs_deadline.tv_nsec / 1000000; |
| if (now_ms >= deadline_ms) { |
| timeout = 1; |
| } else { |
| if ((deadline_ms - now_ms) >= INFINITE) { |
| timeout_max_ms = INFINITE - 1; |
| } else { |
| timeout_max_ms = (DWORD)(deadline_ms - now_ms); |
| } |
| timeout = (SleepConditionVariableCS(cv, &mu->cs, timeout_max_ms) == 0 && |
| GetLastError() == ERROR_TIMEOUT); |
| } |
| } |
| mu->locked = 1; |
| return timeout; |
| } |
| |
| void gpr_cv_signal(gpr_cv *cv) { WakeConditionVariable(cv); } |
| |
| void gpr_cv_broadcast(gpr_cv *cv) { WakeAllConditionVariable(cv); } |
| |
| /*----------------------------------------*/ |
| |
| static void *dummy; |
| struct run_once_func_arg { |
| void (*init_function)(void); |
| }; |
| static BOOL CALLBACK run_once_func(gpr_once *once, void *v, void **pv) { |
| struct run_once_func_arg *arg = v; |
| (*arg->init_function)(); |
| return 1; |
| } |
| |
| void gpr_once_init(gpr_once *once, void (*init_function)(void)) { |
| struct run_once_func_arg arg; |
| arg.init_function = init_function; |
| InitOnceExecuteOnce(once, run_once_func, &arg, &dummy); |
| } |
| |
| #endif /* GPR_WIN32 */ |