124 lines
3.7 KiB
C
124 lines
3.7 KiB
C
/*
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* Win32 mutexes
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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 "windows.h"
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#include "winerror.h"
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#include "k32obj.h"
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#include "process.h"
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#include "thread.h"
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#include "heap.h"
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#include "server/request.h"
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#include "server.h"
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typedef struct _MUTEX
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{
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K32OBJ header;
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} MUTEX;
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/***********************************************************************
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* CreateMutex32A (KERNEL32.166)
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*/
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HANDLE32 WINAPI CreateMutex32A( SECURITY_ATTRIBUTES *sa, BOOL32 owner,
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LPCSTR name )
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{
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struct create_mutex_request req;
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struct create_mutex_reply reply;
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int len = name ? strlen(name) + 1 : 0;
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HANDLE32 handle;
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MUTEX *mutex;
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req.owned = owner;
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req.inherit = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
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CLIENT_SendRequest( REQ_CREATE_MUTEX, -1, 2, &req, sizeof(req), name, len );
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CLIENT_WaitSimpleReply( &reply, sizeof(reply), NULL );
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if (reply.handle == -1) return 0;
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SYSTEM_LOCK();
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mutex = (MUTEX *)K32OBJ_Create( K32OBJ_MUTEX, sizeof(*mutex),
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name, reply.handle, MUTEX_ALL_ACCESS,
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sa, &handle );
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if (mutex) K32OBJ_DecCount( &mutex->header );
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if (handle == INVALID_HANDLE_VALUE32) handle = 0;
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SYSTEM_UNLOCK();
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return handle;
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}
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/***********************************************************************
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* CreateMutex32W (KERNEL32.167)
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*/
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HANDLE32 WINAPI CreateMutex32W( SECURITY_ATTRIBUTES *sa, BOOL32 owner,
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LPCWSTR name )
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{
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LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
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HANDLE32 ret = CreateMutex32A( sa, owner, nameA );
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if (nameA) HeapFree( GetProcessHeap(), 0, nameA );
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return ret;
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}
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/***********************************************************************
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* OpenMutex32A (KERNEL32.541)
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*/
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HANDLE32 WINAPI OpenMutex32A( DWORD access, BOOL32 inherit, LPCSTR name )
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{
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HANDLE32 handle = 0;
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K32OBJ *obj;
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struct open_named_obj_request req;
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struct open_named_obj_reply reply;
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int len = name ? strlen(name) + 1 : 0;
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req.type = OPEN_MUTEX;
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req.access = access;
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req.inherit = inherit;
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CLIENT_SendRequest( REQ_OPEN_NAMED_OBJ, -1, 2, &req, sizeof(req), name, len );
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CLIENT_WaitSimpleReply( &reply, sizeof(reply), NULL );
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if (reply.handle != -1)
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{
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SYSTEM_LOCK();
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if ((obj = K32OBJ_FindNameType( name, K32OBJ_MUTEX )) != NULL)
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{
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handle = HANDLE_Alloc( PROCESS_Current(), obj, access, inherit, reply.handle );
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K32OBJ_DecCount( obj );
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if (handle == INVALID_HANDLE_VALUE32)
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handle = 0; /* must return 0 on failure, not -1 */
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}
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else CLIENT_CloseHandle( reply.handle );
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SYSTEM_UNLOCK();
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}
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return handle;
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}
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/***********************************************************************
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* OpenMutex32W (KERNEL32.542)
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*/
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HANDLE32 WINAPI OpenMutex32W( DWORD access, BOOL32 inherit, LPCWSTR name )
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{
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LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
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HANDLE32 ret = OpenMutex32A( access, inherit, nameA );
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if (nameA) HeapFree( GetProcessHeap(), 0, nameA );
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return ret;
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}
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/***********************************************************************
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* ReleaseMutex (KERNEL32.582)
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*/
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BOOL32 WINAPI ReleaseMutex( HANDLE32 handle )
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{
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struct release_mutex_request req;
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req.handle = HANDLE_GetServerHandle( PROCESS_Current(), handle,
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K32OBJ_MUTEX, MUTEX_MODIFY_STATE );
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if (req.handle == -1) return FALSE;
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CLIENT_SendRequest( REQ_RELEASE_MUTEX, -1, 1, &req, sizeof(req) );
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return !CLIENT_WaitReply( NULL, NULL, 0 );
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}
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