rewrite the device subsystem interfaces (#48)

[lunaix-os.git] / lunaix-os / includes / lunaix / compiler.h

diff --git a/lunaix-os/includes/lunaix/compiler.h b/lunaix-os/includes/lunaix/compiler.h
index da376c1dbd36fe5ebbb6dee04204602ec3681738..ffc73c885e33a7beba59d4a4c43e1be68cbffe1c 100644 (file)
--- a/lunaix-os/includes/lunaix/compiler.h
+++ b/lunaix-os/includes/lunaix/compiler.h
@@ -1,8 +1,61 @@
 #ifndef __LUNAIX_COMPILER_H
 #define __LUNAIX_COMPILER_H
 
-#define likely(x) __builtin_expect((x), 1)
+#define likely(x)               __builtin_expect(!!(x), 1)
+#define unlikely(x)             __builtin_expect(!!(x), 0)
 
-#define weak_alias(name) __attribute__((weak, alias(name)))
+#define __section(name)         __attribute__((section(name)))
+#define weak_alias(name)        __attribute__((weak, alias(name)))
+#define optimize(opt)           __attribute__((optimize(opt)))
+#define _weak                    __attribute__((weak))
+#define noret                   __attribute__((noreturn))
+#define must_inline             __attribute__((always_inline))
+#define must_emit               __attribute__((used))
+#define unreachable             __builtin_unreachable()
+#define no_inline               __attribute__((noinline))
+
+#define _default                _weak
+
+#define msbiti                  (sizeof(int) * 8 - 1)
+#define clz(bits)               __builtin_clz(bits)
+
+#ifdef CONFIG_ARCH_BITS_64
+#define msbitl                  (sizeof(long) * 8 - 1)
+#define clzl(bits)              __builtin_clzl(bits)
+#else
+#define msbitl                  msbiti
+#define clzl(bits)              clz(bits)
+#endif
+
+#define sadd_of(a, b, of)       __builtin_sadd_overflow(a, b, of)
+#define saddl_of(a, b, of)      __builtin_saddl_overflow(a, b, of)
+#define umul_of(a, b, of)       __builtin_umul_overflow(a, b, of)
+#define umull_of(a, b, of)      __builtin_umull_overflow(a, b, of)
+#define offsetof(f, m)          __builtin_offsetof(f, m)
+
+#define prefetch_rd(ptr, ll)    __builtin_prefetch((ptr), 0, ll)
+#define prefetch_wr(ptr, ll)    __builtin_prefetch((ptr), 1, ll)
+
+#define stringify(v) #v
+#define stringify__(v) stringify(v)
+
+#define compact                 __attribute__((packed))
+#define align(v)                __attribute__((aligned (v)))
+
+#define cacheline_size          64
+#define cacheline_align         align(cacheline_size)
+
+#define export_symbol(domain, namespace, symbol)\
+    typeof(symbol)* must_emit __SYMEXPORT_Z##domain##_N##namespace##_S##symbol \
+         = &(symbol)
+
+inline static void noret
+spin()
+{
+    volatile int __infloop = 1;
+    while (__infloop)
+        ;
+    unreachable;
+}
 
 #endif /* __LUNAIX_COMPILER_H */