Add new mutex create where mutex attribute can be set

diff --git a/include/yaz/mutex.h b/include/yaz/mutex.h
index 414e09f..ff8babb 100644 (file)
--- a/include/yaz/mutex.h
+++ b/include/yaz/mutex.h
@@ -52,6 +52,17 @@ typedef struct yaz_cond *YAZ_COND;
  */
 YAZ_EXPORT void yaz_mutex_create(YAZ_MUTEX *mutexp);
 
+/** \brief create MUTEX with custom MUTEX flags
+    \param mutexp is pointer to MUTEX handle (*mutexp must be NULL)
+    \param attr is flags defined by PTHREAD_MUTEX_xxx
+
+    It is important that *mutexp is NULL. If not, yaz_mutex_create will
+    not modify the handle (assumes it is already created!)
+
+    This calls yax_mutex_create_attr(mutexp, PTHREAD_MUTEX_NORMAL)
+ */
+YAZ_EXPORT void yaz_mutex_create_attr(YAZ_MUTEX *mutexp, int flags);
+
 /** \brief enter critical section / AKA lock
     \param mutex MUTEX handle
  */

diff --git a/src/mutex-p.h b/src/mutex-p.h
index 783f119..fedc459 100644 (file)
--- a/src/mutex-p.h
+++ b/src/mutex-p.h
@@ -8,6 +8,7 @@ struct yaz_mutex {
     CRITICAL_SECTION handle;
 #elif YAZ_POSIX_THREADS
     pthread_mutex_t handle;
+    pthread_mutexattr_t *attr;
 #endif
     char *name;
     int log_level;

diff --git a/src/mutex.c b/src/mutex.c
index c4f6d5b..d1cd50e 100644 (file)
--- a/src/mutex.c
+++ b/src/mutex.c
@@ -38,21 +38,27 @@
 
 #include "mutex-p.h"
 
-void yaz_mutex_create(YAZ_MUTEX *p)
-{
+void yaz_mutex_create_attr(YAZ_MUTEX *p, int flags) {
     if (!*p)
     {
         *p = (YAZ_MUTEX) malloc(sizeof(**p));
 #ifdef WIN32
         InitializeCriticalSection(&(*p)->handle);
 #elif YAZ_POSIX_THREADS
-        pthread_mutex_init(&(*p)->handle, 0);
+        (*p)->attr = malloc(sizeof( (*p)->attr));
+        pthread_mutexattr_init((*p)->attr);
+        pthread_mutexattr_settype((*p)->attr, flags);
+        pthread_mutex_init(&(*p)->handle, (*p)->attr);
 #endif
         (*p)->name = 0;
         (*p)->log_level = 0;
     }
 }
 
+void yaz_mutex_create(YAZ_MUTEX *p) {
+    yaz_mutex_create(YAZ_MUTEX *p, 0);
+}
+
 void yaz_mutex_set_name(YAZ_MUTEX p, int log_level, const char *name)
 {
     if (p->name)
@@ -142,6 +148,8 @@ void yaz_mutex_destroy(YAZ_MUTEX *p)
 #ifdef WIN32
         DeleteCriticalSection(&(*p)->handle);
 #elif YAZ_POSIX_THREADS
+        pthread_mutexattr_destroy(&(*p)->attr);
+        free((*p)->attr);
         pthread_mutex_destroy(&(*p)->handle);
 #endif
         if ((*p)->name)