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git-svn-id: file:///srv/svn/repos/haiku/trunk/current@4344 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/kernel/arch/sh4/atomic.h

@@ -0,0 +1,65 @@
+#ifndef _KERNEL_ATOMIC_H
+#define _KERNEL_ATOMIC_H
+
+#include <ktypes.h>
+
+/**
+ * @file kernel/atomic.h
+ * @brief Prototypes for kernel and user versions of atomic
+ *  functions.
+ */
+
+/**
+ * @defgroup Kernel_Atomic Atomic Operations
+ * @ingroup OpenBeOS_Kernel
+ * @{
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif 
+
+/* atomic_add(), atomic_and(), atomic_or() must 
+ * match the definitions in SupportDefs.h
+ */
+
+/**
+ * Atomic add (user version)
+ * @param val Pointer to an integer
+ * @param incr The increment to add (may be -ve)
+ * @note Returns value of val before addition
+ */
+int32 user_atomic_add(vint32 *val, int32 incr);
+
+/**
+ * Atomic and (user version)
+ * @param val Pointer to an integer
+ * @param incr The increment to add (may be -ve)
+ * @note Returns value of val before addition
+ */
+int32 user_atomic_and(vint32 *val, int32 incr);
+
+/**
+ * Atomic or (user version)
+ * @param val Pointer to an integer
+ * @param incr The increment to add (may be -ve)
+ * @note Returns value of val before addition
+ */
+int32 user_atomic_or(vint32 *val, int32 incr);
+
+int32 user_atomic_set(vint32 *val, int32 set_to);
+
+/* Compare the value of val with test_val. If they
+ * are equal then set the value of 'val' to
+ * 'set_to'
+ * @note This is the user version and should not be used within
+ *       the kernel.
+ */
+int32 user_atomic_test_and_set(vint32 *val, int32 set_to, int32 test_val);
+
+#ifdef __cplusplus
+}
+#endif 
+/** @} */
+
+#endif /* _KERNEL_ATOMIC_H */