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Add recursive locks

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This patch adds recursive locks necessary due to the processing of
network filter XML that can reference other network filters, including
references that cause looks. Loops in the XML are prevented but their
detection requires recursive locks.

Signed-off-by: Stefan Berger <stefanb@us.ibm.com>
This commit is contained in:
Stefan Berger 2010-03-25 13:45:59 -04:00 committed by Daniel P. Berrange
parent 67253251c5
commit f895e611df
3 changed files with 19 additions and 0 deletions
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13
src/util/threads-pthread.c
View File

@ -46,6 +46,19 @@ int virMutexInit(virMutexPtr m)
return 0;
}
int virMutexInitRecursive(virMutexPtr m)
{
int ret;
pthread_mutexattr_t attr;
pthread_mutexattr_init(&attr);
pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
if ((ret = pthread_mutex_init(&m->lock, &attr)) != 0) {
errno = ret;
return -1;
}
return 0;
}
void virMutexDestroy(virMutexPtr m)
{
pthread_mutex_destroy(&m->lock);

5
src/util/threads-win32.c
View File

@ -68,6 +68,11 @@ void virThreadOnExit(void)
int virMutexInit(virMutexPtr m)
{
virMutexInitRecursive(m);
}
int virMutexInitRecursive(virMutexPtr m)
{
if (!(m->lock = CreateMutex(NULL, FALSE, NULL))) {
errno = ESRCH;

1
src/util/threads.h
View File

@ -38,6 +38,7 @@ int virThreadInitialize(void) ATTRIBUTE_RETURN_CHECK;
void virThreadOnExit(void);
int virMutexInit(virMutexPtr m) ATTRIBUTE_RETURN_CHECK;
int virMutexInitRecursive(virMutexPtr m) ATTRIBUTE_RETURN_CHECK;
void virMutexDestroy(virMutexPtr m);
void virMutexLock(virMutexPtr m);