Import ncpfs 2.2.1

include/private/asm-generic/atomic.h

@@ -0,0 +1,54 @@
+#ifndef __PRIVATE_LIBNCP_GENERIC_ATOMIC_H__
+#define __PRIVATE_LIBNCP_GENERIC_ATOMIC_H__
+
+#include "config.h"
+
+#include "private/libncp-lock.h"
+
+typedef struct {
+	int counter;
+	ncpt_mutex_t mutex;
+	} ncpt_atomic_t;
+	
+#define NCPT_ATOMIC_INIT(i) { (i), NCPT_MUTEX_INITIALIZER }
+
+static inline int ncpt_atomic_read(ncpt_atomic_t* v) {
+	int tmp;
+	
+	ncpt_mutex_lock(&v->mutex);
+	tmp = v->counter;
+	ncpt_mutex_unlock(&v->mutex);
+	return tmp;
+}
+
+static inline int ncpt_atomic_set(ncpt_atomic_t* v, int i) {
+	v->counter = i;
+	ncpt_mutex_init(&v->mutex);
+	return i;
+}
+
+static inline void ncpt_atomic_add(int i, ncpt_atomic_t* v) {
+	ncpt_mutex_lock(&v->mutex);
+	v->counter += i;
+	ncpt_mutex_unlock(&v->mutex);
+}
+
+static inline void ncpt_atomic_sub(int i, ncpt_atomic_t* v) {
+	ncpt_mutex_lock(&v->mutex);
+	v->counter -= i;
+	ncpt_mutex_unlock(&v->mutex);
+}
+
+#define ncpt_atomic_inc(v) ncpt_atomic_add(1,v)
+#define ncpt_atomic_dec(v) ncpt_atomic_sub(1,v)
+
+static inline int ncpt_atomic_dec_and_test(ncpt_atomic_t* v) {
+	int tmp;
+	
+	ncpt_mutex_lock(&v->mutex);
+	tmp = !(--v->counter);
+	ncpt_mutex_unlock(&v->mutex);
+	return tmp;
+}
+
+#endif	/* __PRIVATE_LIBNCP_GENERIC_ATOMIC_H__ */