Add a xbt wrapper for simcall_mutex_trylock (asked in [#17878])

[simgrid.git] / include / xbt / synchro_core.h

diff --git a/include/xbt/synchro_core.h b/include/xbt/synchro_core.h
index 8eae773..2c8e641 100644 (file)
--- a/include/xbt/synchro_core.h
+++ b/include/xbt/synchro_core.h
@@ -1,13 +1,13 @@
 /* xbt/synchro_core.h -- Synchronization tools                              */
 /* Usable in simulator, (or in real life when mixing with GRAS)             */
 
-/* Copyright (c) 2009, 2010. The SimGrid Team.
+/* Copyright (c) 2009-2014. The SimGrid Team.
  * All rights reserved.                                                     */
 
 /* This program is free software; you can redistribute it and/or modify it
  * under the terms of the license (GNU LGPL) which comes with this package. */
 
-/* splited away from synchro.h since we areused by dynar.h, and synchro.h uses dynar */
+/* splited away from synchro.h since we are used by dynar.h, and synchro.h uses dynar */
 
 
 #ifndef _XBT_THREAD_H
@@ -79,6 +79,15 @@ XBT_PUBLIC(xbt_mutex_t) xbt_mutex_init(void);
 /** @brief Blocks onto the given mutex variable */
 XBT_PUBLIC(void) xbt_mutex_acquire(xbt_mutex_t mutex);
 
+/** @brief Tries to block onto the given mutex variable 
+ * Tries to lock a mutex, return 1 if the mutex is unlocked, else 0.
+ * This function does not block and wait for the mutex to be unlocked.
+ * \param mutex The mutex
+ * \param issuer The process that tries to acquire the mutex
+ * \return 1 - mutex free, 0 - mutex used
+ */
+XBT_PUBLIC(int) xbt_mutex_try_acquire(xbt_mutex_t mutex);
+
 /** @brief Releases the given mutex variable */
 XBT_PUBLIC(void) xbt_mutex_release(xbt_mutex_t mutex);
 
@@ -106,6 +115,13 @@ XBT_PUBLIC(void) xbt_cond_broadcast(xbt_cond_t cond);
 /** @brief Destroys the given mutex variable */
 XBT_PUBLIC(void) xbt_cond_destroy(xbt_cond_t cond);
 
+
+#define XBT_BARRIER_SERIAL_PROCESS -1
+typedef struct s_xbt_bar_ *xbt_bar_t;
+XBT_PUBLIC(xbt_bar_t) xbt_barrier_init( unsigned int count);
+XBT_PUBLIC(void) xbt_barrier_destroy(xbt_bar_t bar);
+XBT_PUBLIC(int) xbt_barrier_wait(xbt_bar_t bar);
+
 /** @} */
 
 SG_END_DECL()