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Diffstat (limited to 'nx-X11/lib/src/locking.h')
| -rw-r--r-- | nx-X11/lib/src/locking.h | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/nx-X11/lib/src/locking.h b/nx-X11/lib/src/locking.h new file mode 100644 index 000000000..277c9afc8 --- /dev/null +++ b/nx-X11/lib/src/locking.h @@ -0,0 +1,156 @@ +/* + +Copyright 1992, 1998 The Open Group + +Permission to use, copy, modify, distribute, and sell this software and its +documentation for any purpose is hereby granted without fee, provided that +the above copyright notice appear in all copies and that both that +copyright notice and this permission notice appear in supporting +documentation. + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN +AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + +Except as contained in this notice, the name of The Open Group shall not be +used in advertising or otherwise to promote the sale, use or other dealings +in this Software without prior written authorization from The Open Group. + +*/ + +/* + * Author: Stephen Gildea, MIT X Consortium + * + * locking.h - data types for C Threads locking. + * Used by XlibInt.c, locking.c, LockDis.c + */ + +#ifndef _X_locking_H_ +#define _X_locking_H_ + +#define xmalloc(s) Xmalloc(s) +#define xfree(s) Xfree(s) +#include <nx-X11/Xlib.h> +#include <nx-X11/Xlibint.h> +#include <nx-X11/Xthreads.h> + +struct _XCVList { + xcondition_t cv; + xReply *buf; + struct _XCVList *next; +}; + +extern xthread_t (*_Xthread_self_fn)( /* in XlibInt.c */ + void +); + +/* Display->lock is a pointer to one of these */ + +struct _XLockInfo { + xmutex_t mutex; /* mutex for critical sections */ + int reply_bytes_left; /* nbytes of the reply still to read */ + Bool reply_was_read; /* _XReadEvents read a reply for _XReply */ + struct _XCVList *reply_awaiters; /* list of CVs for _XReply */ + struct _XCVList **reply_awaiters_tail; + struct _XCVList *event_awaiters; /* list of CVs for _XReadEvents */ + struct _XCVList **event_awaiters_tail; + Bool reply_first; /* who may read, reply queue or event queue */ + /* for XLockDisplay */ + int locking_level; /* how many times into XLockDisplay we are */ + xthread_t locking_thread; /* thread that did XLockDisplay */ + xcondition_t cv; /* wait if another thread has XLockDisplay */ + xthread_t reading_thread; /* cache */ + xthread_t conni_thread; /* thread in XProcessInternalConnection */ + xcondition_t writers; /* wait for writable */ + int num_free_cvls; + struct _XCVList *free_cvls; + /* used only in XlibInt.c */ + void (*pop_reader)( + Display* /* dpy */, + struct _XCVList** /* list */, + struct _XCVList*** /* tail */ + ); + struct _XCVList *(*push_reader)( + Display * /* dpy */, + struct _XCVList*** /* tail */ + ); + void (*condition_wait)( + xcondition_t /* cv */, + xmutex_t /* mutex */ +#if defined(XTHREADS_WARN) || defined(XTHREADS_FILE_LINE) + , char* /* file */, + int /* line */ +#endif + ); + void (*internal_lock_display)( + Display* /* dpy */, + Bool /* wskip */ +#if defined(XTHREADS_WARN) || defined(XTHREADS_FILE_LINE) + , char* /* file */, + int /* line */ +#endif + ); + /* used in XlibInt.c and locking.c */ + void (*condition_signal)( + xcondition_t /* cv */ +#if defined(XTHREADS_WARN) || defined(XTHREADS_FILE_LINE) + , char* /* file */, + int /* line */ +#endif + ); + void (*condition_broadcast)( + xcondition_t /* cv */ +#if defined(XTHREADS_WARN) || defined(XTHREADS_FILE_LINE) + , char* /* file */, + int /* line */ +#endif + ); + /* used in XlibInt.c and XLockDis.c */ + void (*lock_wait)( + Display* /* dpy */ + ); + void (*user_lock_display)( + Display* /* dpy */ + ); + void (*user_unlock_display)( + Display* /* dpy */ + ); + struct _XCVList *(*create_cvl)( + Display * /* dpy */ + ); +}; + +#define UnlockNextEventReader(d) if ((d)->lock) \ + (*(d)->lock->pop_reader)((d),&(d)->lock->event_awaiters,&(d)->lock->event_awaiters_tail) + +#if defined(XTHREADS_WARN) || defined(XTHREADS_FILE_LINE) +#define ConditionWait(d,c) if ((d)->lock) \ + (*(d)->lock->condition_wait)(c, (d)->lock->mutex,__FILE__,__LINE__) +#define ConditionSignal(d,c) if ((d)->lock) \ + (*(d)->lock->condition_signal)(c,__FILE__,__LINE__) +#define ConditionBroadcast(d,c) if ((d)->lock) \ + (*(d)->lock->condition_broadcast)(c,__FILE__,__LINE__) +#else +#define ConditionWait(d,c) if ((d)->lock) \ + (*(d)->lock->condition_wait)(c, (d)->lock->mutex) +#define ConditionSignal(d,c) if ((d)->lock) \ + (*(d)->lock->condition_signal)(c) +#define ConditionBroadcast(d,c) if ((d)->lock) \ + (*(d)->lock->condition_broadcast)(c) +#endif + +typedef struct _LockInfoRec { + xmutex_t lock; +} LockInfoRec; + +/* XOpenDis.c */ +extern int (*_XInitDisplayLock_fn)(Display *dpy); +extern void (*_XFreeDisplayLock_fn)(Display *dpy); + +#endif /* _X_locking_H_ */ |