4 * Copyright 1998 Alexandre Julliard
14 #include "server/request.h"
23 /***********************************************************************
24 * CreateSemaphore32A (KERNEL32.174)
26 HANDLE32 WINAPI CreateSemaphore32A( SECURITY_ATTRIBUTES *sa, LONG initial,
27 LONG max, LPCSTR name )
29 struct create_semaphore_request req;
30 struct create_semaphore_reply reply;
31 int len = name ? strlen(name) + 1 : 0;
35 /* Check parameters */
37 if ((max <= 0) || (initial < 0) || (initial > max))
39 SetLastError( ERROR_INVALID_PARAMETER );
43 req.initial = (unsigned int)initial;
44 req.max = (unsigned int)max;
45 req.inherit = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
47 CLIENT_SendRequest( REQ_CREATE_SEMAPHORE, -1, 2, &req, sizeof(req), name, len );
48 CLIENT_WaitSimpleReply( &reply, sizeof(reply), NULL );
49 if (reply.handle == -1) return 0;
52 sem = (SEMAPHORE *)K32OBJ_Create( K32OBJ_SEMAPHORE, sizeof(*sem),
53 name, reply.handle, SEMAPHORE_ALL_ACCESS,
55 if (sem) K32OBJ_DecCount( &sem->header );
57 if (handle == INVALID_HANDLE_VALUE32) handle = 0;
62 /***********************************************************************
63 * CreateSemaphore32W (KERNEL32.175)
65 HANDLE32 WINAPI CreateSemaphore32W( SECURITY_ATTRIBUTES *sa, LONG initial,
66 LONG max, LPCWSTR name )
68 LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
69 HANDLE32 ret = CreateSemaphore32A( sa, initial, max, nameA );
70 if (nameA) HeapFree( GetProcessHeap(), 0, nameA );
75 /***********************************************************************
76 * OpenSemaphore32A (KERNEL32.545)
78 HANDLE32 WINAPI OpenSemaphore32A( DWORD access, BOOL32 inherit, LPCSTR name )
82 struct open_named_obj_request req;
83 struct open_named_obj_reply reply;
84 int len = name ? strlen(name) + 1 : 0;
86 req.type = OPEN_SEMAPHORE;
88 req.inherit = inherit;
89 CLIENT_SendRequest( REQ_OPEN_NAMED_OBJ, -1, 2, &req, sizeof(req), name, len );
90 CLIENT_WaitSimpleReply( &reply, sizeof(reply), NULL );
91 if (reply.handle != -1)
94 if ((obj = K32OBJ_FindNameType( name, K32OBJ_SEMAPHORE )) != NULL)
96 handle = HANDLE_Alloc( PROCESS_Current(), obj, access, inherit, reply.handle );
97 K32OBJ_DecCount( obj );
98 if (handle == INVALID_HANDLE_VALUE32)
99 handle = 0; /* must return 0 on failure, not -1 */
101 else CLIENT_CloseHandle( reply.handle );
108 /***********************************************************************
109 * OpenSemaphore32W (KERNEL32.546)
111 HANDLE32 WINAPI OpenSemaphore32W( DWORD access, BOOL32 inherit, LPCWSTR name )
113 LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
114 HANDLE32 ret = OpenSemaphore32A( access, inherit, nameA );
115 if (nameA) HeapFree( GetProcessHeap(), 0, nameA );
120 /***********************************************************************
121 * ReleaseSemaphore (KERNEL32.583)
123 BOOL32 WINAPI ReleaseSemaphore( HANDLE32 handle, LONG count, LONG *previous )
125 struct release_semaphore_request req;
126 struct release_semaphore_reply reply;
130 SetLastError( ERROR_INVALID_PARAMETER );
133 req.handle = HANDLE_GetServerHandle( PROCESS_Current(), handle,
134 K32OBJ_SEMAPHORE, SEMAPHORE_MODIFY_STATE );
135 if (req.handle == -1) return FALSE;
136 req.count = (unsigned int)count;
137 CLIENT_SendRequest( REQ_RELEASE_SEMAPHORE, -1, 1, &req, sizeof(req) );
138 if (CLIENT_WaitSimpleReply( &reply, sizeof(reply), NULL )) return FALSE;
139 if (previous) *previous = reply.prev_count;