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Begin adding mutexes. Compiles without SQLITE_OMIT_SHARED_CACHE but we

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get an assertion fault on the shared cache testing. (CVS 4239)

FossilOrigin-Name: 4c1e9ffebe7c611a8b6a89153ae97ab9bca19ea3
This commit is contained in:
drh
2007-08-17 01:14:38 +00:00
parent 6bdec4afb4
commit e53831d644
13 changed files with 449 additions and 219 deletions
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26
src/mutex.c
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@@ -12,7 +12,7 @@
** This file contains the C functions that implement mutexes for
** use by the SQLite core.
**
** $Id: mutex.c,v 1.3 2007/08/16 19:40:17 drh Exp $
** $Id: mutex.c,v 1.4 2007/08/17 01:14:38 drh Exp $
*/
/*
@@ -228,17 +228,19 @@ void sqlite3_mutex_enter(sqlite3_mutex *pMutex){
pthread_mutex_lock(&p->mutex);
}else{
struct RMutex *p = (struct RMutex*)pMutex;
pthread_mutex_lock(&p->auxMutex);
if( p->nRef==0 ){
p->nRef++;
p->owner = pthread_self();
pthread_mutex_lock(&p->mainMutex);
pthread_mutex_unlock(&p->auxMutex);
}else if( pthread_equal(p->owner, pthread_self()) ){
p->nRef++;
pthread_mutex_unlock(&p->auxMutex);
}else{
while( p->nRef ){
while(1){
pthread_mutex_lock(&p->auxMutex);
if( p->nRef==0 ){
p->nRef++;
p->owner = pthread_self();
pthread_mutex_lock(&p->mainMutex);
pthread_mutex_unlock(&p->auxMutex);
break;
}else if( pthread_equal(p->owner, pthread_self()) ){
p->nRef++;
pthread_mutex_unlock(&p->auxMutex);
break;
}else{
pthread_mutex_unlock(&p->auxMutex);
pthread_mutex_lock(&p->mainMutex);
pthread_mutex_unlock(&p->mainMutex);