pripcsem.c (2395B)
1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ 2 /* This Source Code Form is subject to the terms of the Mozilla Public 3 * License, v. 2.0. If a copy of the MPL was not distributed with this 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ 5 6 /* 7 * File: pripcsem.c 8 * 9 * Description: implements the named semaphores API in prsemipc.h 10 * for classic NSPR. If _PR_HAVE_NAMED_SEMAPHORES is not defined, 11 * the named semaphore functions all fail with the error code 12 * PR_NOT_IMPLEMENTED_ERROR. 13 */ 14 15 #include "primpl.h" 16 17 #ifdef _PR_PTHREADS 18 19 # error "This file should not be compiled for the pthreads version" 20 21 #else 22 23 # ifndef _PR_HAVE_NAMED_SEMAPHORES 24 25 PRSem* _PR_MD_OPEN_SEMAPHORE(const char* osname, PRIntn flags, PRIntn mode, 26 PRUintn value) { 27 PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0); 28 return NULL; 29 } 30 31 PRStatus _PR_MD_WAIT_SEMAPHORE(PRSem* sem) { 32 PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0); 33 return PR_FAILURE; 34 } 35 36 PRStatus _PR_MD_POST_SEMAPHORE(PRSem* sem) { 37 PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0); 38 return PR_FAILURE; 39 } 40 41 PRStatus _PR_MD_CLOSE_SEMAPHORE(PRSem* sem) { 42 PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0); 43 return PR_FAILURE; 44 } 45 46 PRStatus _PR_MD_DELETE_SEMAPHORE(const char* osname) { 47 PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0); 48 return PR_FAILURE; 49 } 50 51 # endif /* !_PR_HAVE_NAMED_SEMAPHORES */ 52 53 PR_IMPLEMENT(PRSem*) 54 PR_OpenSemaphore(const char* name, PRIntn flags, PRIntn mode, PRUintn value) { 55 char osname[PR_IPC_NAME_SIZE]; 56 57 if (!_pr_initialized) { 58 _PR_ImplicitInitialization(); 59 } 60 if (_PR_MakeNativeIPCName(name, osname, sizeof(osname), _PRIPCSem) == 61 PR_FAILURE) { 62 return NULL; 63 } 64 return _PR_MD_OPEN_SEMAPHORE(osname, flags, mode, value); 65 } 66 67 PR_IMPLEMENT(PRStatus) PR_WaitSemaphore(PRSem* sem) { 68 return _PR_MD_WAIT_SEMAPHORE(sem); 69 } 70 71 PR_IMPLEMENT(PRStatus) PR_PostSemaphore(PRSem* sem) { 72 return _PR_MD_POST_SEMAPHORE(sem); 73 } 74 75 PR_IMPLEMENT(PRStatus) PR_CloseSemaphore(PRSem* sem) { 76 return _PR_MD_CLOSE_SEMAPHORE(sem); 77 } 78 79 PR_IMPLEMENT(PRStatus) PR_DeleteSemaphore(const char* name) { 80 char osname[PR_IPC_NAME_SIZE]; 81 82 if (!_pr_initialized) { 83 _PR_ImplicitInitialization(); 84 } 85 if (_PR_MakeNativeIPCName(name, osname, sizeof(osname), _PRIPCSem) == 86 PR_FAILURE) { 87 return PR_FAILURE; 88 } 89 return _PR_MD_DELETE_SEMAPHORE(osname); 90 } 91 92 #endif /* _PR_PTHREADS */