The Tor Browser: nsprpub/pr/src/misc/pripcsem.c@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     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/. */

     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  */

    15 #include "primpl.h"

    17 #ifdef _PR_PTHREADS

    19 #error "This file should not be compiled for the pthreads version"

    21 #else

    23 #ifndef _PR_HAVE_NAMED_SEMAPHORES

    25 PRSem * _PR_MD_OPEN_SEMAPHORE(

    26     const char *osname, PRIntn flags, PRIntn mode, PRUintn value)

    27 {

    28     PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0);

    29     return NULL;

    30 }

    32 PRStatus _PR_MD_WAIT_SEMAPHORE(PRSem *sem)

    33 {

    34     PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0);

    35     return PR_FAILURE;

    36 }

    38 PRStatus _PR_MD_POST_SEMAPHORE(PRSem *sem)

    39 {

    40     PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0);

    41     return PR_FAILURE;

    42 }

    44 PRStatus _PR_MD_CLOSE_SEMAPHORE(PRSem *sem)

    45 {

    46     PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0);

    47     return PR_FAILURE;

    48 }

    50 PRStatus _PR_MD_DELETE_SEMAPHORE(const char *osname)

    51 {

    52     PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0);

    53     return PR_FAILURE;

    54 }

    56 #endif /* !_PR_HAVE_NAMED_SEMAPHORES */

    58 PR_IMPLEMENT(PRSem *) PR_OpenSemaphore(

    59     const char *name, PRIntn flags, PRIntn mode, PRUintn value)

    60 {

    61     char osname[PR_IPC_NAME_SIZE];

    63     if (!_pr_initialized) _PR_ImplicitInitialization();

    64     if (_PR_MakeNativeIPCName(name, osname, sizeof(osname), _PRIPCSem)

    65             == PR_FAILURE) {

    66         return NULL;

    67     }

    68     return _PR_MD_OPEN_SEMAPHORE(osname, flags, mode, value);

    69 }

    71 PR_IMPLEMENT(PRStatus) PR_WaitSemaphore(PRSem *sem)

    72 {

    73     return _PR_MD_WAIT_SEMAPHORE(sem);

    74 }

    76 PR_IMPLEMENT(PRStatus) PR_PostSemaphore(PRSem *sem)

    77 {

    78     return _PR_MD_POST_SEMAPHORE(sem);

    79 }

    81 PR_IMPLEMENT(PRStatus) PR_CloseSemaphore(PRSem *sem)

    82 {

    83     return _PR_MD_CLOSE_SEMAPHORE(sem);

    84 }

    86 PR_IMPLEMENT(PRStatus) PR_DeleteSemaphore(const char *name)

    87 {

    88     char osname[PR_IPC_NAME_SIZE];

    90     if (!_pr_initialized) _PR_ImplicitInitialization();

    91     if (_PR_MakeNativeIPCName(name, osname, sizeof(osname), _PRIPCSem)

    92             == PR_FAILURE) {

    93         return PR_FAILURE;

    94     }

    95     return _PR_MD_DELETE_SEMAPHORE(osname);

    96 }

    98 #endif /* _PR_PTHREADS */

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