summaryrefslogtreecommitdiff
path: root/sound/core/seq/seq_lock.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /sound/core/seq/seq_lock.c
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'sound/core/seq/seq_lock.c')
-rw-r--r--sound/core/seq/seq_lock.c48
1 files changed, 48 insertions, 0 deletions
diff --git a/sound/core/seq/seq_lock.c b/sound/core/seq/seq_lock.c
new file mode 100644
index 000000000000..b09cee058fa7
--- /dev/null
+++ b/sound/core/seq/seq_lock.c
@@ -0,0 +1,48 @@
+/*
+ * Do sleep inside a spin-lock
+ * Copyright (c) 1999 by Takashi Iwai <tiwai@suse.de>
+ *
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <sound/driver.h>
+#include <sound/core.h>
+#include "seq_lock.h"
+
+#if defined(CONFIG_SMP) || defined(CONFIG_SND_DEBUG)
+
+/* wait until all locks are released */
+void snd_use_lock_sync_helper(snd_use_lock_t *lockp, const char *file, int line)
+{
+ int max_count = 5 * HZ;
+
+ if (atomic_read(lockp) < 0) {
+ printk(KERN_WARNING "seq_lock: lock trouble [counter = %d] in %s:%d\n", atomic_read(lockp), file, line);
+ return;
+ }
+ while (atomic_read(lockp) > 0) {
+ if (max_count == 0) {
+ snd_printk(KERN_WARNING "seq_lock: timeout [%d left] in %s:%d\n", atomic_read(lockp), file, line);
+ break;
+ }
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ schedule_timeout(1);
+ max_count--;
+ }
+}
+
+#endif