On Tue, Mar 23, 2010 at 10:54:07AM -0400, stefanb@xxxxxxxxxx wrote:
> 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@xxxxxxxxxx>
>
> ---
> src/util/threads-pthread.c | 13 +++++++++++++
> src/util/threads-win32.c | 5 +++++
> src/util/threads.h | 1 +
> 3 files changed, 19 insertions(+)
>
> Index: libvirt-acl/src/util/threads-pthread.c
> ===================================================================
> --- libvirt-acl.orig/src/util/threads-pthread.c
> +++ libvirt-acl/src/util/threads-pthread.c
> @@ -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);
> Index: libvirt-acl/src/util/threads.h
> ===================================================================
> --- libvirt-acl.orig/src/util/threads.h
> +++ libvirt-acl/src/util/threads.h
> @@ -38,6 +38,7 @@ int virThreadInitialize(void) ATTRIBUTE_
> 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);
> Index: libvirt-acl/src/util/threads-win32.c
> ===================================================================
> --- libvirt-acl.orig/src/util/threads-win32.c
> +++ libvirt-acl/src/util/threads-win32.c
> @@ -69,6 +69,11 @@ void virThreadOnExit(void)
>
> int virMutexInit(virMutexPtr m)
> {
> + virMutexInitRecursive(m);
> +}
> +
> +int virMutexInitRecursive(virMutexPtr m)
> +{
> if (!(m->lock = CreateMutex(NULL, FALSE, NULL))) {
> errno = ESRCH;
> return -1;
>
ACK
Daniel
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