From: Wim Taymans <wim.taymans@gmail.com>
Date: Sat, 15 Jun 2002 16:12:20 +0000 (+0000)
Subject: Better error handling when mmap'ing
X-Git-Tag: BRANCH-RELEASE-0_4_0-ROOT~51
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=32f702aa20c4e9ca3013056154b525eeb962549e;p=platform%2Fupstream%2Fgstreamer.git

Better error handling when mmap'ing

Original commit message from CVS:
Better error handling when mmap'ing
---

diff --git a/gst/cothreads.c b/gst/cothreads.c
index 88be004..6028b7f 100644
--- a/gst/cothreads.c
+++ b/gst/cothreads.c
@@ -146,7 +146,7 @@ cothread_state*
 cothread_create (cothread_context *ctx)
 {
   cothread_state *thread;
-  void *sp;
+  void *sp, *mmaped = 0;
   guchar *stack_end;
   gint slot = 0;
 
@@ -178,11 +178,16 @@ cothread_create (cothread_context *ctx)
   thread = (cothread_state *) (stack_end + ((slot - 1) * COTHREAD_STACKSIZE));
   GST_DEBUG (0, "new stack at %p", thread);
 
-  if (mmap ((void *) thread, COTHREAD_STACKSIZE,
-	    PROT_READ | PROT_WRITE | PROT_EXEC, MAP_FIXED | MAP_PRIVATE | MAP_ANON, -1, 0) == MAP_FAILED) {
+  mmaped = mmap ((void *) thread, COTHREAD_STACKSIZE,
+	    PROT_READ | PROT_WRITE | PROT_EXEC, MAP_FIXED | MAP_PRIVATE | MAP_ANON, -1, 0);
+  if (mmaped == MAP_FAILED) {
     perror ("mmap'ing cothread stack space");
     return NULL;
   }
+  if (mmaped != thread) {
+    g_warning ("could not mmap requested memory");
+    return NULL;
+  }
 
   thread->ctx = ctx;
   thread->threadnum = slot;