From: Sascha Hauer <s.hauer@pengutronix.de>
To: barebox@lists.infradead.org
Subject: [PATCH 1/5] Add a timeout polling loop convenience wrapper
Date: Thu, 9 Feb 2012 14:39:54 +0100 [thread overview]
Message-ID: <1328794798-17699-2-git-send-email-s.hauer@pengutronix.de> (raw)
In-Reply-To: <1328794798-17699-1-git-send-email-s.hauer@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
include/clock.h | 19 +++++++++++++++++++
1 files changed, 19 insertions(+), 0 deletions(-)
diff --git a/include/clock.h b/include/clock.h
index af5b939..123f874 100644
--- a/include/clock.h
+++ b/include/clock.h
@@ -40,4 +40,23 @@ void mdelay(unsigned long msecs);
#define MSECOND ((uint64_t)(1000 * 1000))
#define USECOND ((uint64_t)(1000))
+/*
+ * Convenience wrapper to implement a typical polling loop with
+ * timeout. returns 0 if the condition became true within the
+ * timeout or -ETIMEDOUT otherwise
+ */
+#define wait_on_timeout(timeout, condition) \
+({ \
+ int __ret = 0; \
+ uint64_t __to_start = get_time_ns(); \
+ \
+ while (!(condition)) { \
+ if (is_timeout(__to_start, (timeout))) { \
+ __ret = -ETIMEDOUT; \
+ break; \
+ } \
+ } \
+ __ret; \
+})
+
#endif /* CLOCK_H */
--
1.7.9
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next prev parent reply other threads:[~2012-02-09 13:40 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-09 13:39 [PATCH] more mci related stuff Sascha Hauer
2012-02-09 13:39 ` Sascha Hauer [this message]
2012-02-09 13:39 ` [PATCH 2/5] mci i.MX esdhc: use timeout loops Sascha Hauer
2012-02-09 13:39 ` [PATCH 3/5] mci: Add a complete list of EXT_CSD_* fields from the kernel Sascha Hauer
2012-02-09 13:39 ` [PATCH 4/5] mci: Fix 8 bit mmc cards Sascha Hauer
2012-02-09 13:39 ` [PATCH 5/5] mci i.MX esdhc: make 8bit modes platform dependent Sascha Hauer
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