From cb7ade8f9674a6833d792f3de3dc8f0658cd40bf Mon Sep 17 00:00:00 2001
From: alegrand <alegrand@48e7efb5-ca39-0410-a469-dd3cf9ba447f>
Date: Thu, 23 Feb 2006 11:46:23 +0000
Subject: [PATCH] Adding Derrick's function to check whether a host is up or
 down.

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/simgrid/simgrid/trunk@1933 48e7efb5-ca39-0410-a469-dd3cf9ba447f
---
 include/msg/msg.h |  1 +
 src/msg/host.c    | 18 ++++++++++++++++++
 2 files changed, 19 insertions(+)

diff --git a/include/msg/msg.h b/include/msg/msg.h
index 1ad3093a90..4a570b6adb 100644
--- a/include/msg/msg.h
+++ b/include/msg/msg.h
@@ -38,6 +38,7 @@ m_host_t MSG_host_self(void);
 int MSG_get_host_msgload(m_host_t host);
 /* int MSG_get_msgload(void); This function lacks specification; discard it */
 double MSG_get_host_speed(m_host_t h);
+int MSG_host_is_avail (m_host_t h);
 
 void MSG_create_environment(const char *file);
 
diff --git a/src/msg/host.c b/src/msg/host.c
index 8e2fd41cdf..b252d89276 100644
--- a/src/msg/host.c
+++ b/src/msg/host.c
@@ -185,3 +185,21 @@ double MSG_get_host_speed(m_host_t h)
   return(surf_workstation_resource->
 	 extension_public->get_speed(h->simdata->host,1.0));
 }
+
+/** \ingroup msg_gos_functions
+ * \brief Determine if a host is available.
+ *
+ * \param host host to test
+ */
+int MSG_host_is_avail (m_host_t h)
+{
+  xbt_assert0((h!= NULL), "Invalid parameters");
+
+  e_surf_cpu_state_t cpustate =
+    surf_workstation_resource->extension_public->get_state(h->simdata->host);
+
+  xbt_assert0((cpustate == SURF_CPU_ON || cpustate == SURF_CPU_OFF),
+	      "Invalid cpu state");
+
+  return (cpustate==SURF_CPU_ON);
+}
-- 
2.20.1