| /* |
| * Win32 semaphores |
| * |
| * Copyright 1998 Alexandre Julliard |
| */ |
| |
| #include <assert.h> |
| #include <string.h> |
| #include "winerror.h" |
| #include "heap.h" |
| #include "server.h" |
| |
| |
| /*********************************************************************** |
| * CreateSemaphore32A (KERNEL32.174) |
| */ |
| HANDLE WINAPI CreateSemaphoreA( SECURITY_ATTRIBUTES *sa, LONG initial, LONG max, LPCSTR name ) |
| { |
| struct create_semaphore_request *req = get_req_buffer(); |
| |
| /* Check parameters */ |
| |
| if ((max <= 0) || (initial < 0) || (initial > max)) |
| { |
| SetLastError( ERROR_INVALID_PARAMETER ); |
| return 0; |
| } |
| |
| req->initial = (unsigned int)initial; |
| req->max = (unsigned int)max; |
| req->inherit = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle); |
| lstrcpynA( req->name, name ? name : "", server_remaining(req->name) ); |
| SetLastError(0); |
| server_call( REQ_CREATE_SEMAPHORE ); |
| if (req->handle == -1) return 0; |
| return req->handle; |
| } |
| |
| |
| /*********************************************************************** |
| * CreateSemaphore32W (KERNEL32.175) |
| */ |
| HANDLE WINAPI CreateSemaphoreW( SECURITY_ATTRIBUTES *sa, LONG initial, |
| LONG max, LPCWSTR name ) |
| { |
| LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name ); |
| HANDLE ret = CreateSemaphoreA( sa, initial, max, nameA ); |
| if (nameA) HeapFree( GetProcessHeap(), 0, nameA ); |
| return ret; |
| } |
| |
| |
| /*********************************************************************** |
| * OpenSemaphore32A (KERNEL32.545) |
| */ |
| HANDLE WINAPI OpenSemaphoreA( DWORD access, BOOL inherit, LPCSTR name ) |
| { |
| struct open_semaphore_request *req = get_req_buffer(); |
| |
| req->access = access; |
| req->inherit = inherit; |
| lstrcpynA( req->name, name ? name : "", server_remaining(req->name) ); |
| server_call( REQ_OPEN_SEMAPHORE ); |
| if (req->handle == -1) return 0; /* must return 0 on failure, not -1 */ |
| return req->handle; |
| } |
| |
| |
| /*********************************************************************** |
| * OpenSemaphore32W (KERNEL32.546) |
| */ |
| HANDLE WINAPI OpenSemaphoreW( DWORD access, BOOL inherit, LPCWSTR name ) |
| { |
| LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name ); |
| HANDLE ret = OpenSemaphoreA( access, inherit, nameA ); |
| if (nameA) HeapFree( GetProcessHeap(), 0, nameA ); |
| return ret; |
| } |
| |
| |
| /*********************************************************************** |
| * ReleaseSemaphore (KERNEL32.583) |
| */ |
| BOOL WINAPI ReleaseSemaphore( HANDLE handle, LONG count, LONG *previous ) |
| { |
| struct release_semaphore_request *req = get_req_buffer(); |
| |
| if (count < 0) |
| { |
| SetLastError( ERROR_INVALID_PARAMETER ); |
| return FALSE; |
| } |
| req->handle = handle; |
| req->count = (unsigned int)count; |
| if (server_call( REQ_RELEASE_SEMAPHORE )) return FALSE; |
| if (previous) *previous = req->prev_count; |
| return TRUE; |
| } |