#ifndef __LUNAIX_SPIKE_H
#define __LUNAIX_SPIKE_H
-// Some helper functions. As helpful as Spike the Dragon! :)
+#include <lunaix/compiler.h>
-// 除法向上取整
-#define CEIL(v, k) (((v) + (1 << (k)) - 1) >> (k))
+/** Some helper functions. As helpful as Spike the Dragon! :) **/
-// 除法向下取整
-#define FLOOR(v, k) ((v) >> (k))
+// 除法 v/(2^k) 向上取整
+#define CEIL(v, k) (((v) + (1 << (k)) - 1) >> (k))
-// 获取v最近的最大k倍数
-#define ROUNDUP(v, k) (((v) + (k) - 1) & ~((k) - 1))
+#define ICEIL(x, y) ((x) / (y) + ((x) % (y) != 0))
-// 获取v最近的最小k倍数
-#define ROUNDDOWN(v, k) ((v) & ~((k) - 1))
+// 除法 v/(2^k) 向下取整
+#define FLOOR(v, k) ((v) >> (k))
-inline static void spin() {
- while(1);
-}
+// 获取v最近的最大k倍数 (k=2^n)
+#define ROUNDUP(v, k) (((v) + (k)-1) & ~((k)-1))
-#ifdef __LUNAIXOS_DEBUG__
-#define assert(cond) \
- if (!(cond)) { \
- __assert_fail(#cond, __FILE__, __LINE__); \
- }
+// 获取v最近的最小k倍数 (k=2^m)
+#define ROUNDDOWN(v, k) ((v) & ~((k)-1))
-#define assert_msg(cond, msg) \
- if (!(cond)) { \
- __assert_fail(msg, __FILE__, __LINE__); \
- }
-void __assert_fail(const char* expr, const char* file, unsigned int line) __attribute__((noinline, noreturn));
+#define MIN(a, b) ((a) < (b) ? (a) : (b))
+#define MAX(a, b) ((a) > (b) ? (a) : (b))
+
+#define is_pot(val) (((val) != 0) || ((val) & ((val)-1)) == 0)
+
+/**
+ * @brief Fast log base 2 for integer, utilizing constant unfolding.
+ * Adopted from
+ * https://elixir.bootlin.com/linux/v4.4/source/include/linux/log2.h#L85
+ *
+ */
+#define ILOG2(x) \
+ (__builtin_constant_p(x) ? ((x) == 0 ? 0 \
+ : ((x) & (1ul << 31)) ? 31 \
+ : ((x) & (1ul << 30)) ? 30 \
+ : ((x) & (1ul << 29)) ? 29 \
+ : ((x) & (1ul << 28)) ? 28 \
+ : ((x) & (1ul << 27)) ? 27 \
+ : ((x) & (1ul << 26)) ? 26 \
+ : ((x) & (1ul << 25)) ? 25 \
+ : ((x) & (1ul << 24)) ? 24 \
+ : ((x) & (1ul << 23)) ? 23 \
+ : ((x) & (1ul << 22)) ? 22 \
+ : ((x) & (1ul << 21)) ? 21 \
+ : ((x) & (1ul << 20)) ? 20 \
+ : ((x) & (1ul << 19)) ? 19 \
+ : ((x) & (1ul << 18)) ? 18 \
+ : ((x) & (1ul << 17)) ? 17 \
+ : ((x) & (1ul << 16)) ? 16 \
+ : ((x) & (1ul << 15)) ? 15 \
+ : ((x) & (1ul << 14)) ? 14 \
+ : ((x) & (1ul << 13)) ? 13 \
+ : ((x) & (1ul << 12)) ? 12 \
+ : ((x) & (1ul << 11)) ? 11 \
+ : ((x) & (1ul << 10)) ? 10 \
+ : ((x) & (1ul << 9)) ? 9 \
+ : ((x) & (1ul << 8)) ? 8 \
+ : ((x) & (1ul << 7)) ? 7 \
+ : ((x) & (1ul << 6)) ? 6 \
+ : ((x) & (1ul << 5)) ? 5 \
+ : ((x) & (1ul << 4)) ? 4 \
+ : ((x) & (1ul << 3)) ? 3 \
+ : ((x) & (1ul << 2)) ? 2 \
+ : ((x) & (1ul << 1)) ? 1 \
+ : 0) \
+ : (31 - clz(x)))
+
+#ifndef __LUNAIXOS_NASSERT__
+#define assert(cond) \
+ do { \
+ if (unlikely(!(cond))) { \
+ __assert_fail(#cond, __FILE__, __LINE__); \
+ } \
+ } while(0)
+
+#define assert_msg(cond, msg) \
+ do { \
+ if (unlikely(!(cond))) { \
+ __assert_fail(msg, __FILE__, __LINE__); \
+ } \
+ } while(0)
+
+#define must_success(statement) \
+ do { \
+ int err = (statement); \
+ if (err) fail(#statement " failed"); \
+ } while(0)
+
+#define fail(msg) __assert_fail(msg, __FILE__, __LINE__);
+
+void
+__assert_fail(const char* expr, const char* file, unsigned int line)
+ __attribute__((noinline, noreturn));
#else
-#define assert(cond) (void)(cond); //assert nothing
-#define assert_msg(cond, msg) (void)(cond); //assert nothing
-#endif
+#define assert(cond) (void)(cond); // assert nothing
+#define assert_msg(cond, msg) (void)(cond); // assert nothing
-void panick(const char* msg);
+#endif // __LUNAIXOS_NASSERT__
+void noret
+panick(const char* msg);
-#define wait_until(cond) while(!(cond));
-#define loop_until(cond) while(!(cond));
+#define wait_until(cond) \
+ while (!(cond)) \
+ ;
+#define loop_until(cond) \
+ while (!(cond)) \
+ ;
+#define wait_until_expire(cond, max) \
+ ({ \
+ unsigned int __wcounter__ = (max); \
+ while (!(cond) && __wcounter__-- > 1) \
+ ; \
+ __wcounter__; \
+ })
#endif /* __LUNAIX_SPIKE_H */
git://scm.lunaixsky.com / lunaix-os.git / blobdiff