Website : rimsha.abasa.com
backdoor
Home
Console
Upload
information
Create File
Create Folder
About
Tools
:
/
usr
/
include
/
nspr
/
Filename :
pripcsem.h
back
Copy
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ /* * File: pripcsem.h * * Description: named semaphores for interprocess * synchronization * * Unrelated processes obtain access to a shared semaphore * by specifying its name. * * Our goal is to support named semaphores on at least * Unix and Win32 platforms. The implementation will use * one of the three native semaphore APIs: POSIX, System V, * and Win32. * * Because POSIX named semaphores have kernel persistence, * we are forced to have a delete function in this API. */ #ifndef pripcsem_h___ #define pripcsem_h___ #include "prtypes.h" #include "prio.h" PR_BEGIN_EXTERN_C /* * PRSem is an opaque structure that represents a named * semaphore. */ typedef struct PRSem PRSem; /* * PR_OpenSemaphore -- * * Create or open a named semaphore with the specified name. * A handle to the semaphore is returned. * * If the named semaphore doesn't exist and the PR_SEM_CREATE * flag is specified, the named semaphore is created. The * created semaphore needs to be removed from the system with * a PR_DeleteSemaphore call. * * If PR_SEM_CREATE is specified, the third argument is the * access permission bits of the new semaphore (same * interpretation as the mode argument to PR_Open) and the * fourth argument is the initial value of the new semaphore. * If PR_SEM_CREATE is not specified, the third and fourth * arguments are ignored. */ #define PR_SEM_CREATE 0x1 /* create if not exist */ #define PR_SEM_EXCL 0x2 /* fail if already exists */ NSPR_API(PRSem *) PR_OpenSemaphore( const char *name, PRIntn flags, PRIntn mode, PRUintn value); /* * PR_WaitSemaphore -- * * If the value of the semaphore is > 0, decrement the value and return. * If the value is 0, sleep until the value becomes > 0, then decrement * the value and return. * * The "test and decrement" operation is performed atomically. */ NSPR_API(PRStatus) PR_WaitSemaphore(PRSem *sem); /* * PR_PostSemaphore -- * * Increment the value of the named semaphore by 1. */ NSPR_API(PRStatus) PR_PostSemaphore(PRSem *sem); /* * PR_CloseSemaphore -- * * Close a named semaphore handle. */ NSPR_API(PRStatus) PR_CloseSemaphore(PRSem *sem); /* * PR_DeleteSemaphore -- * * Remove a named semaphore from the system. */ NSPR_API(PRStatus) PR_DeleteSemaphore(const char *name); PR_END_EXTERN_C #endif /* pripcsem_h___ */