1 /* 2 * 3 * Copyright 2015 gRPC authors. 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 * 17 */ 18 19 #include <grpc/support/port_platform.h> 20 21 #include "src/core/lib/iomgr/port.h" 22 23 #ifdef GRPC_POSIX_WAKEUP_FD 24 25 #include <stddef.h> 26 #include "src/core/lib/iomgr/wakeup_fd_cv.h" 27 #include "src/core/lib/iomgr/wakeup_fd_pipe.h" 28 #include "src/core/lib/iomgr/wakeup_fd_posix.h" 29 30 static const grpc_wakeup_fd_vtable* wakeup_fd_vtable = nullptr; 31 32 int grpc_allow_specialized_wakeup_fd = 1; 33 int grpc_allow_pipe_wakeup_fd = 1; 34 35 int has_real_wakeup_fd = 1; 36 int cv_wakeup_fds_enabled = 0; 37 38 void grpc_wakeup_fd_global_init(void) { 39 if (grpc_allow_specialized_wakeup_fd && 40 grpc_specialized_wakeup_fd_vtable.check_availability()) { 41 wakeup_fd_vtable = &grpc_specialized_wakeup_fd_vtable; 42 } else if (grpc_allow_pipe_wakeup_fd && 43 grpc_pipe_wakeup_fd_vtable.check_availability()) { 44 wakeup_fd_vtable = &grpc_pipe_wakeup_fd_vtable; 45 } else { 46 has_real_wakeup_fd = 0; 47 } 48 } 49 50 void grpc_wakeup_fd_global_destroy(void) { wakeup_fd_vtable = nullptr; } 51 52 int grpc_has_wakeup_fd(void) { return has_real_wakeup_fd; } 53 54 int grpc_cv_wakeup_fds_enabled(void) { return cv_wakeup_fds_enabled; } 55 56 void grpc_enable_cv_wakeup_fds(int enable) { cv_wakeup_fds_enabled = enable; } 57 58 grpc_error* grpc_wakeup_fd_init(grpc_wakeup_fd* fd_info) { 59 if (cv_wakeup_fds_enabled) { 60 return grpc_cv_wakeup_fd_vtable.init(fd_info); 61 } 62 return wakeup_fd_vtable->init(fd_info); 63 } 64 65 grpc_error* grpc_wakeup_fd_consume_wakeup(grpc_wakeup_fd* fd_info) { 66 if (cv_wakeup_fds_enabled) { 67 return grpc_cv_wakeup_fd_vtable.consume(fd_info); 68 } 69 return wakeup_fd_vtable->consume(fd_info); 70 } 71 72 grpc_error* grpc_wakeup_fd_wakeup(grpc_wakeup_fd* fd_info) { 73 if (cv_wakeup_fds_enabled) { 74 return grpc_cv_wakeup_fd_vtable.wakeup(fd_info); 75 } 76 return wakeup_fd_vtable->wakeup(fd_info); 77 } 78 79 void grpc_wakeup_fd_destroy(grpc_wakeup_fd* fd_info) { 80 if (cv_wakeup_fds_enabled) { 81 grpc_cv_wakeup_fd_vtable.destroy(fd_info); 82 } else { 83 wakeup_fd_vtable->destroy(fd_info); 84 } 85 } 86 87 #endif /* GRPC_POSIX_WAKEUP_FD */ 88
