| /* |
| * |
| * 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. |
| * |
| */ |
| |
| /* Windows implementation for gpr threads. */ |
| |
| #include <grpc/support/port_platform.h> |
| |
| #ifdef GPR_WIN32 |
| |
| #include <windows.h> |
| #include <string.h> |
| #include <grpc/support/alloc.h> |
| #include <grpc/support/log.h> |
| #include <grpc/support/thd.h> |
| |
| #if defined(_MSC_VER) |
| #define thread_local __declspec(thread) |
| #elif defined(__GNUC__) |
| #define thread_local __thread |
| #else |
| #error "Unknown compiler - please file a bug report" |
| #endif |
| |
| struct thd_info { |
| void (*body)(void *arg); /* body of a thread */ |
| void *arg; /* argument to a thread */ |
| HANDLE join_event; /* if joinable, the join event */ |
| int joinable; /* true if not detached */ |
| }; |
| |
| static thread_local struct thd_info *g_thd_info; |
| |
| /* Destroys a thread info */ |
| static void destroy_thread(struct thd_info *t) { |
| if (t->joinable) CloseHandle(t->join_event); |
| gpr_free(t); |
| } |
| |
| /* Body of every thread started via gpr_thd_new. */ |
| static DWORD WINAPI thread_body(void *v) { |
| g_thd_info = (struct thd_info *)v; |
| g_thd_info->body(g_thd_info->arg); |
| if (g_thd_info->joinable) { |
| BOOL ret = SetEvent(g_thd_info->join_event); |
| GPR_ASSERT(ret); |
| } else { |
| destroy_thread(g_thd_info); |
| } |
| return 0; |
| } |
| |
| int gpr_thd_new(gpr_thd_id *t, void (*thd_body)(void *arg), void *arg, |
| const gpr_thd_options *options) { |
| HANDLE handle; |
| struct thd_info *info = gpr_malloc(sizeof(*info)); |
| info->body = thd_body; |
| info->arg = arg; |
| *t = 0; |
| if (gpr_thd_options_is_joinable(options)) { |
| info->joinable = 1; |
| info->join_event = CreateEvent(NULL, FALSE, FALSE, NULL); |
| if (info->join_event == NULL) { |
| gpr_free(info); |
| return 0; |
| } |
| } else { |
| info->joinable = 0; |
| } |
| handle = CreateThread(NULL, 64 * 1024, thread_body, info, 0, NULL); |
| if (handle == NULL) { |
| destroy_thread(info); |
| } else { |
| *t = (gpr_thd_id)info; |
| CloseHandle(handle); |
| } |
| return handle != NULL; |
| } |
| |
| gpr_thd_id gpr_thd_currentid(void) { |
| return (gpr_thd_id)g_thd_info; |
| } |
| |
| void gpr_thd_join(gpr_thd_id t) { |
| struct thd_info *info = (struct thd_info *)t; |
| DWORD ret = WaitForSingleObject(info->join_event, INFINITE); |
| GPR_ASSERT(ret == WAIT_OBJECT_0); |
| destroy_thread(info); |
| } |
| |
| #endif /* GPR_WIN32 */ |