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120 lines
3.2 KiB
C
120 lines
3.2 KiB
C
/*
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* Win32 semaphores
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*
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* Copyright 1998 Alexandre Julliard
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*/
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#include <assert.h>
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#include <string.h>
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#include "winerror.h"
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#include "server.h"
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/***********************************************************************
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* CreateSemaphoreA (KERNEL32.174)
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*/
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HANDLE WINAPI CreateSemaphoreA( SECURITY_ATTRIBUTES *sa, LONG initial, LONG max, LPCSTR name )
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{
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struct create_semaphore_request *req = get_req_buffer();
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/* Check parameters */
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if ((max <= 0) || (initial < 0) || (initial > max))
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{
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SetLastError( ERROR_INVALID_PARAMETER );
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return 0;
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}
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req->initial = (unsigned int)initial;
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req->max = (unsigned int)max;
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req->inherit = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
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server_strcpyAtoW( req->name, name );
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SetLastError(0);
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server_call( REQ_CREATE_SEMAPHORE );
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if (req->handle == -1) return 0;
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return req->handle;
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}
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/***********************************************************************
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* CreateSemaphoreW (KERNEL32.175)
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*/
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HANDLE WINAPI CreateSemaphoreW( SECURITY_ATTRIBUTES *sa, LONG initial,
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LONG max, LPCWSTR name )
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{
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struct create_semaphore_request *req = get_req_buffer();
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/* Check parameters */
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if ((max <= 0) || (initial < 0) || (initial > max))
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{
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SetLastError( ERROR_INVALID_PARAMETER );
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return 0;
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}
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req->initial = (unsigned int)initial;
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req->max = (unsigned int)max;
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req->inherit = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
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server_strcpyW( req->name, name );
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SetLastError(0);
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server_call( REQ_CREATE_SEMAPHORE );
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if (req->handle == -1) return 0;
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return req->handle;
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}
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/***********************************************************************
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* OpenSemaphoreA (KERNEL32.545)
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*/
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HANDLE WINAPI OpenSemaphoreA( DWORD access, BOOL inherit, LPCSTR name )
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{
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struct open_semaphore_request *req = get_req_buffer();
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req->access = access;
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req->inherit = inherit;
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server_strcpyAtoW( req->name, name );
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server_call( REQ_OPEN_SEMAPHORE );
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if (req->handle == -1) return 0; /* must return 0 on failure, not -1 */
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return req->handle;
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}
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/***********************************************************************
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* OpenSemaphoreW (KERNEL32.546)
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*/
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HANDLE WINAPI OpenSemaphoreW( DWORD access, BOOL inherit, LPCWSTR name )
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{
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struct open_semaphore_request *req = get_req_buffer();
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req->access = access;
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req->inherit = inherit;
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server_strcpyW( req->name, name );
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server_call( REQ_OPEN_SEMAPHORE );
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if (req->handle == -1) return 0; /* must return 0 on failure, not -1 */
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return req->handle;
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}
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/***********************************************************************
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* ReleaseSemaphore (KERNEL32.583)
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*/
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BOOL WINAPI ReleaseSemaphore( HANDLE handle, LONG count, LONG *previous )
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{
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BOOL ret = FALSE;
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struct release_semaphore_request *req = get_req_buffer();
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if (count < 0)
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{
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SetLastError( ERROR_INVALID_PARAMETER );
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return FALSE;
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}
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req->handle = handle;
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req->count = (unsigned int)count;
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if (!server_call( REQ_RELEASE_SEMAPHORE ))
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{
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if (previous) *previous = req->prev_count;
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ret = TRUE;
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}
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return ret;
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}
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