From 4b6e936c8a66da4fc25f35914b0e9b9e66a31359 Mon Sep 17 00:00:00 2001
From: Giovanni Di Sirio <gdisirio@gmail.com>
Date: Thu, 17 Mar 2016 10:00:40 +0000
Subject: git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@9129
 35acf78f-673a-0410-8e92-d51de3d6d3f4

---
 os/nil/include/ch.h | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

(limited to 'os/nil')

diff --git a/os/nil/include/ch.h b/os/nil/include/ch.h
index 419822471..507128186 100644
--- a/os/nil/include/ch.h
+++ b/os/nil/include/ch.h
@@ -854,6 +854,33 @@ struct nil_system {
 #define US2RTC(freq, usec) (rtcnt_t)((((freq) + 999999UL) / 1000000UL) * (usec))
 /** @} */
 
+/**
+ * @name    Semaphores macros
+ * @{
+ */
+/**
+ * @brief   Data part of a static semaphore initializer.
+ * @details This macro should be used when statically initializing a semaphore
+ *          that is part of a bigger structure.
+ *
+ * @param[in] name      the name of the semaphore variable
+ * @param[in] n         the counter initial value, this value must be
+ *                      non-negative
+ */
+#define _SEMAPHORE_DATA(name, n) {n}
+
+/**
+ * @brief   Static semaphore initializer.
+ * @details Statically initialized semaphores require no explicit
+ *          initialization using @p chSemInit().
+ *
+ * @param[in] name      the name of the semaphore variable
+ * @param[in] n         the counter initial value, this value must be
+ *                      non-negative
+ */
+#define SEMAPHORE_DECL(name, n) semaphore_t name = _SEMAPHORE_DATA(name, n)
+/** @} */
+
 /**
  * @name    Macro Functions
  * @{
-- 
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