Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=1411d5a7fbe7dce1568b6f0a94c7cbc69eed1bfe
Commit: 1411d5a7fbe7dce1568b6f0a94c7cbc69eed1bfe
Parent: 294d5cc233d81ec4aec77ebc60dc5752a3d0082a
Author: Matthew Wilcox <[EMAIL PROTECTED]>
AuthorDate: Thu Dec 6 12:00:00 2007 -0500
Committer: Matthew Wilcox <[EMAIL PROTECTED]>
CommitDate: Thu Dec 6 17:40:14 2007 -0500
Add wait_event_killable
Signed-off-by: Matthew Wilcox <[EMAIL PROTECTED]>
---
include/linux/wait.h | 41 +++++++++++++++++++++++++++++++++++++++++
1 files changed, 41 insertions(+), 0 deletions(-)
diff --git a/include/linux/wait.h b/include/linux/wait.h
index 0a410a4..1f4fb0a 100644
--- a/include/linux/wait.h
+++ b/include/linux/wait.h
@@ -346,6 +346,47 @@ do {
\
__ret; \
})
+#define __wait_event_killable(wq, condition, ret) \
+do { \
+ DEFINE_WAIT(__wait); \
+ \
+ for (;;) { \
+ prepare_to_wait(&wq, &__wait, TASK_KILLABLE); \
+ if (condition) \
+ break; \
+ if (!fatal_signal_pending(current)) { \
+ schedule(); \
+ continue; \
+ } \
+ ret = -ERESTARTSYS; \
+ break; \
+ } \
+ finish_wait(&wq, &__wait); \
+} while (0)
+
+/**
+ * wait_event_killable - sleep until a condition gets true
+ * @wq: the waitqueue to wait on
+ * @condition: a C expression for the event to wait for
+ *
+ * The process is put to sleep (TASK_KILLABLE) until the
+ * @condition evaluates to true or a signal is received.
+ * The @condition is checked each time the waitqueue @wq is woken up.
+ *
+ * wake_up() has to be called after changing any variable that could
+ * change the result of the wait condition.
+ *
+ * The function will return -ERESTARTSYS if it was interrupted by a
+ * signal and 0 if @condition evaluated to true.
+ */
+#define wait_event_killable(wq, condition) \
+({ \
+ int __ret = 0; \
+ if (!(condition)) \
+ __wait_event_killable(wq, condition, __ret); \
+ __ret; \
+})
+
/*
* Must be called with the spinlock in the wait_queue_head_t held.
*/
-
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