sam3 pmc: add functions to handle peripheral clock enable/disable;

[bertos.git] / bertos / cfg / compiler.h

diff --git a/bertos/cfg/compiler.h b/bertos/cfg/compiler.h
index 843af838c502621f473713c8dff6a945357b28e6..ac60848f5da9eec2b3877e62d8ace28e1ac3847e 100644 (file)
--- a/bertos/cfg/compiler.h
+++ b/bertos/cfg/compiler.h
@@ -209,6 +209,7 @@
        #define RESTRICT                __restrict__
        #define MUST_CHECK              __attribute__((warn_unused_result))
        #define PACKED                  __attribute__((packed))
+       #define ALIGNED(x)              __attribute__ ((__aligned__(x)))
        #if CPU_ARM | CPU_CM3
                #define NAKED           __attribute__((naked))
        #else
@@ -360,6 +361,9 @@
 #ifndef PACKED
 #define PACKED                 /* nothing */
 #endif
+#ifndef ALIGNED
+#define ALIGNED                /* nothing */
+#endif
 #ifndef MEMORY_BARRIER
 #define MEMORY_BARRIER         /* nothing */
 #warning No memory barrier defined for select compiler. If you use the kernel check it.
@@ -455,6 +459,14 @@ typedef const void * const_iptr_t;
 typedef unsigned char sigbit_t;  /**< Type for signal bits. */
 typedef unsigned char sigmask_t; /**< Type for signal masks. */
 
+/**
+ * Signal structure
+ */
+typedef struct Signal
+{
+       sigmask_t    wait;    /**< Signals the process is waiting for */
+       sigmask_t    recv;    /**< Received signals */
+} Signal;
 
 /**
  * \name Standard type definitions.
@@ -599,4 +611,11 @@ typedef unsigned char sigmask_t; /**< Type for signal masks. */
                        do { (void)(&(var) == (type *)0); } while(0)
 #endif
 
+/**
+ * Prevent the compiler from optimizing access to the variable \a x, enforcing
+ * a refetch from memory. This also forbid from reordering successing instances
+ * of ACCESS_SAFE().
+ */
+#define ACCESS_SAFE(x) (*(volatile typeof(x) *)&(x))
+
 #endif /* BERTOS_COMPILER_H */