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Sun Feb 15 12:02:59 1998 Alexandre Julliard <julliard@lrc.epfl.ch> * [graphics/x11drv/*.c] [objects/*.c] A few X11 critical section optimizations, mostly with XGet/PutPixel. * [scheduler/sysdeps.c] [misc/main.c] Make sure X11 critical section is available before any Xlib call. * [if1632/relay.c] [tools/build.c] Yet another attempt at fixing Catch/Throw. * [loader/pe_image.c] Fixed broken PE DLL loading. * [include/winnt.h] [scheduler/handle.c] [scheduler/*.c] Implemented handle access rights. Added Get/SetHandleInformation. Sun Feb 15 09:45:23 1997 Andreas Mohr <100.30936@germany.net> * [misc/winsock.c] Fixed bug in WSACleanup which lead to crashes in WINSOCK_HandleIO. * [graphics/fontengine.c] [include/font.h] Minor improvements. * [memory/global.c] Implemented GlobalEntryHandle. * [misc/toolhelp.c] Fixed a memory bug in Notify*register. * [misc/w32scomb.c] Improved Get16DLLAddress. * [objects/gdiobj.c] Implemented GdiSeeGdiDo. Sat Feb 14 14:57:39 1998 John Richardson <jrichard@zko.dec.com> * [win32/console.c] Added the console implementation, AllocConsole, FreeConsole, CONSOLE_InheritConsole. * [documentation/console] Some documentation on the console. * [include/winerror.h] Added some error defines. * [scheduler/k32obj.c] Registered the scheduler ops. Fri Feb 13 19:35:35 1998 James Moody <013263m@dragon.acadiau.ca> * [ole/ole2nls.c] Some English language fixes for missing values. * [controls/listbox.c] Fix to allow an empty listbox to deselect all items. * [relay32/user32.spec] [windows/keyboard.c] CreateAcceleratorTableA stub method. * [windows/sysmetrics.c] Added missing SM_CXCURSOR & SM_CYCURSOR initializers. * [windows/message.c] PostThreadMessage32A stub method. Fri Feb 13 17:12:24 1998 Jim Peterson <jspeter@roanoke.infi.net> * [libtest/hello3res.rc] [libtest/hello3.c] [libtest/Makefile.in] Updated the 'hello3' test so that it functions properly again. Fri Feb 13 14:08:07 1998 Martin Boehme <boehme@informatik.mu-luebeck.de> * [graphics/mapping.c] Fixed the embarrassing bugs I introduced into DPtoLP and LPtoDP. * [windows/scroll.c] Prevent ScrollWindow32 from sending WM_ERASEBKGND. Thu Feb 12 22:46:53 1998 Huw D M Davies <h.davies1@physics.oxford.ac.uk> * [objects/metafile] [include/ldt.h] Fix to cope with records longer than 64K. * [windows/clipboard.c] Clean up bitmaps and metapicts properly. Mon Feb 3 21:52:18 1998 Karl Backström <karl_b@geocities.com> * [programs/winhelp/Sw.rc] [resources/sysres_Sw.rc] Minor update of Swedish language support.
217 lines
5.9 KiB
C
217 lines
5.9 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 "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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typedef struct
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{
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K32OBJ header;
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THREAD_QUEUE wait_queue;
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LONG count;
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LONG max;
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} SEMAPHORE;
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static BOOL32 SEMAPHORE_Signaled( K32OBJ *obj, DWORD thread_id );
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static BOOL32 SEMAPHORE_Satisfied( K32OBJ *obj, DWORD thread_id );
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static void SEMAPHORE_AddWait( K32OBJ *obj, DWORD thread_id );
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static void SEMAPHORE_RemoveWait( K32OBJ *obj, DWORD thread_id );
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static void SEMAPHORE_Destroy( K32OBJ *obj );
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const K32OBJ_OPS SEMAPHORE_Ops =
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{
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SEMAPHORE_Signaled, /* signaled */
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SEMAPHORE_Satisfied, /* satisfied */
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SEMAPHORE_AddWait, /* add_wait */
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SEMAPHORE_RemoveWait, /* remove_wait */
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SEMAPHORE_Destroy /* destroy */
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};
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/***********************************************************************
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* CreateSemaphore32A (KERNEL32.174)
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*/
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HANDLE32 WINAPI CreateSemaphore32A( SECURITY_ATTRIBUTES *sa, LONG initial,
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LONG max, LPCSTR name )
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{
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HANDLE32 handle;
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SEMAPHORE *sem;
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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 INVALID_HANDLE_VALUE32;
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}
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SYSTEM_LOCK();
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sem = (SEMAPHORE *)K32OBJ_Create( K32OBJ_SEMAPHORE, sizeof(*sem),
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name, SEMAPHORE_ALL_ACCESS, &handle );
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if (sem)
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{
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/* Finish initializing it */
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sem->wait_queue = NULL;
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sem->count = initial;
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sem->max = max;
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K32OBJ_DecCount( &sem->header );
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}
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SYSTEM_UNLOCK();
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return handle;
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}
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/***********************************************************************
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* CreateSemaphore32W (KERNEL32.175)
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*/
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HANDLE32 WINAPI CreateSemaphore32W( SECURITY_ATTRIBUTES *sa, LONG initial,
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LONG max, LPCWSTR name )
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{
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LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
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HANDLE32 ret = CreateSemaphore32A( sa, initial, max, 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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* OpenSemaphore32A (KERNEL32.545)
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*/
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HANDLE32 WINAPI OpenSemaphore32A( 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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SYSTEM_LOCK();
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if ((obj = K32OBJ_FindNameType( name, K32OBJ_SEMAPHORE )) != NULL)
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{
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handle = HANDLE_Alloc( obj, access, inherit );
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K32OBJ_DecCount( obj );
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}
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SYSTEM_UNLOCK();
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return handle;
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}
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/***********************************************************************
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* OpenSemaphore32W (KERNEL32.546)
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*/
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HANDLE32 WINAPI OpenSemaphore32W( 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 = OpenSemaphore32A( 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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* ReleaseSemaphore (KERNEL32.583)
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*/
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BOOL32 WINAPI ReleaseSemaphore( HANDLE32 handle, LONG count, LONG *previous )
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{
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SEMAPHORE *sem;
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SYSTEM_LOCK();
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if (!(sem = (SEMAPHORE *)HANDLE_GetObjPtr( handle, K32OBJ_SEMAPHORE,
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SEMAPHORE_MODIFY_STATE )))
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{
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SYSTEM_UNLOCK();
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return FALSE;
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}
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if (previous) *previous = sem->count;
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if (sem->count + count > sem->max)
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{
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SYSTEM_UNLOCK();
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SetLastError( ERROR_TOO_MANY_POSTS );
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return FALSE;
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}
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if (sem->count > 0)
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{
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/* There cannot be any thread waiting if the count is > 0 */
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assert( sem->wait_queue == NULL );
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sem->count += count;
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}
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else
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{
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sem->count = count;
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SYNC_WakeUp( &sem->wait_queue, count );
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}
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K32OBJ_DecCount( &sem->header );
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SYSTEM_UNLOCK();
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return TRUE;
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}
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/***********************************************************************
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* SEMAPHORE_Signaled
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*/
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static BOOL32 SEMAPHORE_Signaled( K32OBJ *obj, DWORD thread_id )
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{
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SEMAPHORE *sem = (SEMAPHORE *)obj;
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assert( obj->type == K32OBJ_SEMAPHORE );
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return (sem->count > 0);
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}
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/***********************************************************************
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* SEMAPHORE_Satisfied
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*
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* Wait on this object has been satisfied.
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*/
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static BOOL32 SEMAPHORE_Satisfied( K32OBJ *obj, DWORD thread_id )
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{
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SEMAPHORE *sem = (SEMAPHORE *)obj;
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assert( obj->type == K32OBJ_SEMAPHORE );
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assert( sem->count > 0 );
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sem->count--;
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return FALSE; /* Not abandoned */
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}
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/***********************************************************************
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* SEMAPHORE_AddWait
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*
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* Add current thread to object wait queue.
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*/
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static void SEMAPHORE_AddWait( K32OBJ *obj, DWORD thread_id )
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{
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SEMAPHORE *sem = (SEMAPHORE *)obj;
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assert( obj->type == K32OBJ_SEMAPHORE );
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THREAD_AddQueue( &sem->wait_queue, THREAD_ID_TO_THDB(thread_id) );
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}
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/***********************************************************************
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* SEMAPHORE_RemoveWait
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*
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* Remove thread from object wait queue.
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*/
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static void SEMAPHORE_RemoveWait( K32OBJ *obj, DWORD thread_id )
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{
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SEMAPHORE *sem = (SEMAPHORE *)obj;
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assert( obj->type == K32OBJ_SEMAPHORE );
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THREAD_RemoveQueue( &sem->wait_queue, THREAD_ID_TO_THDB(thread_id) );
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}
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/***********************************************************************
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* SEMAPHORE_Destroy
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*/
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static void SEMAPHORE_Destroy( K32OBJ *obj )
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{
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SEMAPHORE *sem = (SEMAPHORE *)obj;
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assert( obj->type == K32OBJ_SEMAPHORE );
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/* There cannot be any thread on the list since the ref count is 0 */
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assert( sem->wait_queue == NULL );
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obj->type = K32OBJ_UNKNOWN;
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HeapFree( SystemHeap, 0, sem );
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}
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