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Improved syslevel handling, store currently held syslevels in thread 

database, WIN_CritSection converted to syslevel.
This commit is contained in:
Ulrich Weigand 1999-05-22 16:28:47 +00:00 committed by Alexandre Julliard
parent 2431488775
commit c5b8b3aeae
5 changed files with 146 additions and 95 deletions
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10
if1632/kernel.spec
View File

@ -340,11 +340,11 @@ file krnl386.exe
432 stub FileTimeToLocalFileTime
434 pascal16 UnicodeToAnsi(ptr ptr word) UnicodeToAnsi16
435 stub GetTaskFlags
436 stub _ConfirmSysLevel
437 stub _CheckNotSysLevel
438 stub _CreateSysLevel
439 stub _EnterSysLevel
440 stub _LeaveSysLevel
436 pascal16 _ConfirmSysLevel(ptr) _ConfirmSysLevel
437 pascal16 _CheckNotSysLevel(ptr) _CheckNotSysLevel
438 pascal16 _CreateSysLevel(ptr long) _CreateSysLevel
439 pascal16 _EnterSysLevel(ptr) _EnterSysLevel
440 pascal16 _LeaveSysLevel(ptr) _LeaveSysLevel
441 pascal CreateThread16(ptr long segptr segptr long ptr) THUNK_CreateThread16
442 pascal VWin32_EventCreate() VWin32_EventCreate
443 pascal VWin32_EventDestroy(long) VWin32_EventDestroy

17
include/syslevel.h
View File

@ -10,6 +10,12 @@
#include "windef.h"
#include "winbase.h"
typedef struct tagSYSLEVEL
{
CRITICAL_SECTION crst;
INT level;
} SYSLEVEL;
extern WORD SYSLEVEL_Win16CurrentTeb;
extern WORD SYSLEVEL_EmergencyTeb;
@ -18,14 +24,17 @@ VOID WINAPI SYSLEVEL_EnterWin16Lock(VOID);
VOID WINAPI SYSLEVEL_LeaveWin16Lock(VOID);
VOID SYSLEVEL_ReleaseWin16Lock(VOID);
VOID SYSLEVEL_RestoreWin16Lock(VOID);
VOID SYSLEVEL_CheckNotLevel( INT level );
VOID WINAPI GetpWin16Lock(CRITICAL_SECTION **lock);
VOID WINAPI GetpWin16Lock(SYSLEVEL **lock);
SEGPTR WINAPI GetpWin16Lock16(void);
VOID WINAPI _EnterSysLevel(CRITICAL_SECTION *lock);
VOID WINAPI _LeaveSysLevel(CRITICAL_SECTION *lock);
DWORD WINAPI _ConfirmWin16Lock(void);
VOID WINAPI _CreateSysLevel(SYSLEVEL *lock, INT level);
VOID WINAPI _EnterSysLevel(SYSLEVEL *lock);
VOID WINAPI _LeaveSysLevel(SYSLEVEL *lock);
DWORD WINAPI _ConfirmSysLevel(SYSLEVEL *lock);
VOID WINAPI ReleaseThunkLock(DWORD *mutex_count);
VOID WINAPI RestoreThunkLock(DWORD mutex_count);

3
include/thread.h
View File

@ -9,6 +9,7 @@
#include "config.h"
#include "winbase.h"
#include "syslevel.h"
#include "selectors.h" /* for SET_FS */
struct _PDB;
@ -78,7 +79,7 @@ typedef struct _THDB
void *entry_arg; /* 1c4 Entry point arg (was: unknown) */
DWORD unknown5[4]; /* 1c8 Unknown */
DWORD sys_count[4]; /* 1d8 Syslevel mutex entry counters */
CRITICAL_SECTION *sys_mutex[4];/* 1e8 Syslevel mutex pointers */
SYSLEVEL *sys_mutex[4]; /* 1e8 Syslevel mutex pointers */
DWORD unknown6[2]; /* 1f8 Unknown */
/* The following are Wine-specific fields */
int socket; /* Socket for server communication */

162
scheduler/syslevel.c
View File

@ -5,6 +5,8 @@
*/
#include <unistd.h>
#include <sys/types.h>
#include <signal.h>
#include "syslevel.h"
#include "heap.h"
#include "stackframe.h"
@ -12,7 +14,7 @@
DEFAULT_DEBUG_CHANNEL(win32)
static CRITICAL_SECTION Win16Mutex;
static SYSLEVEL Win16Mutex;
static SEGPTR segpWin16Mutex;
/* Global variable to save current TEB while in 16-bit code */
@ -27,19 +29,18 @@ WORD SYSLEVEL_EmergencyTeb = 0;
*/
void SYSLEVEL_Init(void)
{
CRITICAL_SECTION **w16Mutex = SEGPTR_ALLOC(sizeof(CRITICAL_SECTION *));
SYSLEVEL **w16Mutex = SEGPTR_ALLOC(sizeof(SYSLEVEL *));
*w16Mutex = &Win16Mutex;
segpWin16Mutex = SEGPTR_GET(w16Mutex);
InitializeCriticalSection(&Win16Mutex);
MakeCriticalSectionGlobal(&Win16Mutex);
_CreateSysLevel( &Win16Mutex, 1 );
}
/************************************************************************
* GetpWin16Lock32 (KERNEL32.93)
*/
VOID WINAPI GetpWin16Lock(CRITICAL_SECTION **lock)
VOID WINAPI GetpWin16Lock(SYSLEVEL **lock)
{
*lock = &Win16Mutex;
}
@ -53,44 +54,114 @@ SEGPTR WINAPI GetpWin16Lock16(void)
}
/************************************************************************
* _EnterSysLevel (KERNEL32.97)
* _CreateSysLevel (KERNEL.438)
*/
VOID WINAPI _EnterSysLevel(CRITICAL_SECTION *lock)
VOID WINAPI _CreateSysLevel(SYSLEVEL *lock, INT level)
{
EnterCriticalSection(lock);
InitializeCriticalSection( &lock->crst );
MakeCriticalSectionGlobal( &lock->crst );
lock->level = level;
TRACE( win32, "(%p, %d): handle is %d\n",
lock, level, lock->crst.LockSemaphore );
}
/************************************************************************
* _EnterSysLevel (KERNEL32.97) (KERNEL.439)
*/
VOID WINAPI _EnterSysLevel(SYSLEVEL *lock)
{
THDB *thdb = THREAD_Current();
int i;
TRACE( win32, "(%p, level %d): thread %p (fs %04x, pid %d) count before %ld\n",
lock, lock->level, thdb->server_tid, thdb->teb_sel, getpid(),
thdb->sys_count[lock->level] );
for ( i = 3; i > lock->level; i-- )
if ( thdb->sys_count[i] > 0 )
{
ERR( win32, "(%p, level %d): Holding %p, level %d. Expect deadlock!\n",
lock, lock->level, thdb->sys_mutex[i], i );
}
EnterCriticalSection( &lock->crst );
thdb->sys_count[lock->level]++;
thdb->sys_mutex[lock->level] = lock;
TRACE( win32, "(%p, level %d): thread %p (fs %04x, pid %d) count after %ld\n",
lock, lock->level, thdb->server_tid, thdb->teb_sel, getpid(),
thdb->sys_count[lock->level] );
if (lock == &Win16Mutex)
GET_FS( SYSLEVEL_Win16CurrentTeb );
}
/************************************************************************
* _LeaveSysLevel (KERNEL32.98)
* _LeaveSysLevel (KERNEL32.98) (KERNEL.440)
*/
VOID WINAPI _LeaveSysLevel(CRITICAL_SECTION *lock)
VOID WINAPI _LeaveSysLevel(SYSLEVEL *lock)
{
LeaveCriticalSection(lock);
THDB *thdb = THREAD_Current();
TRACE( win32, "(%p, level %d): thread %p (fs %04x, pid %d) count before %ld\n",
lock, lock->level, thdb->server_tid, thdb->teb_sel, getpid(),
thdb->sys_count[lock->level] );
if ( thdb->sys_count[lock->level] <= 0 || thdb->sys_mutex[lock->level] != lock )
{
ERR( win32, "(%p, level %d): Invalid state: count %ld mutex %p.\n",
lock, lock->level, thdb->sys_count[lock->level],
thdb->sys_mutex[lock->level] );
}
else
{
if ( --thdb->sys_count[lock->level] == 0 )
thdb->sys_mutex[lock->level] = NULL;
}
LeaveCriticalSection( &lock->crst );
TRACE( win32, "(%p, level %d): thread %p (fs %04x, pid %d) count after %ld\n",
lock, lock->level, thdb->server_tid, thdb->teb_sel, getpid(),
thdb->sys_count[lock->level] );
}
/************************************************************************
* (KERNEL32.86)
*/
VOID WINAPI _KERNEL32_86(CRITICAL_SECTION *lock)
VOID WINAPI _KERNEL32_86(SYSLEVEL *lock)
{
_LeaveSysLevel(lock);
}
/************************************************************************
* _ConfirmSysLevel (KERNEL32.95) (KERNEL.436)
*/
DWORD WINAPI _ConfirmSysLevel(SYSLEVEL *lock)
{
if ( lock && lock->crst.OwningThread == GetCurrentThreadId() )
return lock->crst.RecursionCount;
else
return 0L;
}
/************************************************************************
* _CheckNotSysLevel (KERNEL32.94) (KERNEL.437)
*/
VOID WINAPI _CheckNotSysLevel(SYSLEVEL *lock)
{
FIXME(win32, "(%p)\n", lock);
}
/************************************************************************
* SYSLEVEL_EnterWin16Lock [KERNEL.480]
*/
VOID WINAPI SYSLEVEL_EnterWin16Lock(VOID)
{
TRACE(win32, "thread %04x (pid %d) about to enter\n",
THREAD_Current()->teb_sel, getpid());
_EnterSysLevel(&Win16Mutex);
TRACE(win32, "thread %04x (pid %d) entered, count is %ld\n",
THREAD_Current()->teb_sel, getpid(), Win16Mutex.RecursionCount);
}
/************************************************************************
@ -98,37 +169,14 @@ VOID WINAPI SYSLEVEL_EnterWin16Lock(VOID)
*/
VOID WINAPI SYSLEVEL_LeaveWin16Lock(VOID)
{
TRACE(win32, "thread %04x (pid %d) about to leave, count is %ld\n",
THREAD_Current()->teb_sel, getpid(), Win16Mutex.RecursionCount);
_LeaveSysLevel(&Win16Mutex);
}
/************************************************************************
* _CheckNotSysLevel (KERNEL32.94)
*/
VOID WINAPI _CheckNotSysLevel(CRITICAL_SECTION *lock)
{
FIXME(win32, "()\n");
}
/************************************************************************
* _ConfirmSysLevel (KERNEL32.95)
*/
VOID WINAPI _ConfirmSysLevel(CRITICAL_SECTION *lock)
{
FIXME(win32, "()\n");
}
/************************************************************************
* _ConfirmWin16Lock (KERNEL32.96)
*/
DWORD WINAPI _ConfirmWin16Lock(void)
{
if ( Win16Mutex.OwningThread == GetCurrentThreadId() )
return Win16Mutex.RecursionCount;
else
return 0L;
return _ConfirmSysLevel(&Win16Mutex);
}
/************************************************************************
@ -136,7 +184,7 @@ DWORD WINAPI _ConfirmWin16Lock(void)
*/
VOID WINAPI ReleaseThunkLock(DWORD *mutex_count)
{
DWORD count = Win16Mutex.RecursionCount;
DWORD count = _ConfirmSysLevel(&Win16Mutex);
*mutex_count = count;
while (count-- > 0)
@ -159,9 +207,6 @@ VOID SYSLEVEL_ReleaseWin16Lock(VOID)
{
DWORD count;
TRACE(win32, "thread %04x (pid %d) about to release, count is %ld\n",
THREAD_Current()->teb_sel, getpid(), Win16Mutex.RecursionCount);
ReleaseThunkLock(&count);
if (count > 0xffff)
@ -180,12 +225,25 @@ VOID SYSLEVEL_RestoreWin16Lock(VOID)
if (!count)
ERR(win32, "Win16Mutex recursion count is zero!\n");
TRACE(win32, "thread %04x (pid %d) about to restore (count %ld)\n",
THREAD_Current()->teb_sel, getpid(), count);
RestoreThunkLock(count);
TRACE(win32, "thread %04x (pid %d) restored lock, count is %ld\n",
THREAD_Current()->teb_sel, getpid(), Win16Mutex.RecursionCount);
}
/************************************************************************
* SYSLEVEL_CheckNotLevel
*/
VOID SYSLEVEL_CheckNotLevel( INT level )
{
THDB *thdb = THREAD_Current();
INT i;
for ( i = 3; i >= level; i-- )
if ( thdb->sys_count[i] > 0 )
{
ERR( win32, "(%d): Holding lock of level %d!\n",
level, i );
kill( getpid(), SIGHUP );
break;
}
}

47
windows/win.c
View File

@ -33,6 +33,7 @@
#include "mdi.h"
#include "local.h"
#include "desktop.h"
#include "syslevel.h"
DECLARE_DEBUG_CHANNEL(msg)
DECLARE_DEBUG_CHANNEL(win)
@ -50,7 +51,7 @@ static WORD wDragWidth = 4;
static WORD wDragHeight= 3;
/* thread safeness */
static CRITICAL_SECTION WIN_CritSection;
static SYSLEVEL WIN_SysLevel;
/***********************************************************************
* WIN_Init
@ -58,8 +59,7 @@ static CRITICAL_SECTION WIN_CritSection;
void WIN_Init( void )
{
/* Initialisation of the critical section for thread safeness */
InitializeCriticalSection(&WIN_CritSection);
MakeCriticalSectionGlobal(&WIN_CritSection);
_CreateSysLevel( &WIN_SysLevel, 2 );
}
/***********************************************************************
@ -67,9 +67,9 @@ void WIN_Init( void )
*
* Locks access to all WND structures for thread safeness
*/
void WIN_LockWnds()
void WIN_LockWnds( void )
{
EnterCriticalSection(&WIN_CritSection);
_EnterSysLevel( &WIN_SysLevel );
}
/***********************************************************************
@ -77,34 +77,24 @@ void WIN_LockWnds()
*
* Unlocks access to all WND structures
*/
void WIN_UnlockWnds()
void WIN_UnlockWnds( void )
{
LeaveCriticalSection(&WIN_CritSection);
_LeaveSysLevel( &WIN_SysLevel );
}
/***********************************************************************
* WIN_SuspendWndsLock
*
* Suspend the lock on WND structures.
* Returns the number of locks suspended
*/
int WIN_SuspendWndsLock()
int WIN_SuspendWndsLock( void )
{
int isuspendedLocks = 0;
int isuspendedLocks = _ConfirmSysLevel( &WIN_SysLevel );
int count = isuspendedLocks;
/* make sure that the lock is not suspended by different thread than
the owning thread */
if(WIN_CritSection.OwningThread != GetCurrentThreadId())
{
return 0;
}
/* set the value of isuspendedlock to the actual recursion count
of the critical section */
isuspendedLocks = WIN_CritSection.RecursionCount;
/* set the recursion count of the critical section to 1
so the owning thread will be able to leave it */
while (WIN_CritSection.RecursionCount > 1) WIN_UnlockWnds();
/* leave critical section*/
WIN_UnlockWnds();
while ( count-- > 0 )
_LeaveSysLevel( &WIN_SysLevel );
return isuspendedLocks;
}
@ -116,15 +106,8 @@ int WIN_SuspendWndsLock()
*/
void WIN_RestoreWndsLock( int ipreviousLocks )
{
if(!ipreviousLocks)
{
return;
}
/* restore the lock */
WIN_LockWnds();
/* set the recursion count of the critical section to the
value of suspended locks (given by WIN_SuspendWndsLock())*/
while (WIN_CritSection.RecursionCount < ipreviousLocks) WIN_LockWnds();
while ( ipreviousLocks-- > 0 )
_EnterSysLevel( &WIN_SysLevel );
}
/***********************************************************************