From 37999b8a998a16745afd4b9355fb15c5a55dfae2 Mon Sep 17 00:00:00 2001
From: faggioli <faggioli@35b4ef3e-fd22-0410-ab77-dab3279adceb>
Date: Wed, 19 Dec 2007 09:22:31 +0000
Subject: [PATCH] Added the support for POSIX98 symbols for priority
 inheritance in mutexes if AQuoSA is used.

git-svn-id: http://www.frescor.org/private/svn/frescor/fosa/trunk@967 35b4ef3e-fd22-0410-ab77-dab3279adceb
---
 include/fosa_opaque_types.h            |  3 +++
 src_aquosa/fosa_mutexes_and_condvars.c | 15 ++++++++++++---
 src_aquosa/frsh_fosa.c                 |  2 --
 3 files changed, 15 insertions(+), 5 deletions(-)

diff --git a/include/fosa_opaque_types.h b/include/fosa_opaque_types.h
index 4ac1c06..b587c91 100644
--- a/include/fosa_opaque_types.h
+++ b/include/fosa_opaque_types.h
@@ -74,6 +74,9 @@
 
 #if defined(RT_LINUX) || defined(MARTE_OS) || defined(AQuoSA)
 
+#ifdef AQuoSA
+#define __USE_UNIX98
+#endif // AQuoSA
 #include <pthread.h>
 #include <signal.h>
 #include <time.h>
diff --git a/src_aquosa/fosa_mutexes_and_condvars.c b/src_aquosa/fosa_mutexes_and_condvars.c
index 32f4110..efe1701 100644
--- a/src_aquosa/fosa_mutexes_and_condvars.c
+++ b/src_aquosa/fosa_mutexes_and_condvars.c
@@ -62,14 +62,23 @@
 
 
 /*******************************************************
- * Mutexes with priority ceiling
+ * Mutexes with priority/bandwidth inheritance
  ******************************************************/
 
 
 int fosa_mutex_init(frsh_mutex_t *mutex, int prioceiling)
 {
-	/* priority ceiling if, for now, ignored */
-	return pthread_mutex_init(mutex, NULL);
+	pthread_mutexattr_t mutex_attr;
+
+	/* prioceiling serves as a flag */
+	if (prioceiling) {
+		/* We use priority inheritance as the default protocol */
+		pthread_mutexattr_init(&mutex_attr);
+		pthread_mutexattr_setprotocol(&mutex_attr, PTHREAD_PRIO_INHERIT);
+		
+		return pthread_mutex_init(mutex, &mutex_attr);
+	} else
+		return pthread_mutex_init(mutex, NULL);
 }
 
 int fosa_mutex_destroy(frsh_mutex_t *mutex)
diff --git a/src_aquosa/frsh_fosa.c b/src_aquosa/frsh_fosa.c
index 493f477..f2a2d57 100644
--- a/src_aquosa/frsh_fosa.c
+++ b/src_aquosa/frsh_fosa.c
@@ -53,8 +53,6 @@
 //================================================
 
 #include "frsh_fosa.h"
-#include <pthread.h>
-#include <stdio.h>
 
 /*************************
  * Thread attributes
-- 
2.39.2