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util: likely() and unlikely() macros

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Matheus
2024-10-05 11:31:22 -03:00
parent fe1e24b3ea
commit a8a40ac032
2 changed files with 6 additions and 2 deletions
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kernel-src/include/logging.h
+3 -2
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@@ -5,6 +5,7 @@
#include <panic.h> #include <panic.h>
#include <mutex.h> #include <mutex.h>
#include <arch/cpu.h> #include <arch/cpu.h>
#include <util.h>
void _putchar(char c); void _putchar(char c);
void logging_sethook(void (*fun)(char)); void logging_sethook(void (*fun)(char));
@@ -16,7 +17,7 @@ extern mutex_t printf_mutex;
#endif #endif
#define printf(...) { \ #define printf(...) { \
if (current_thread()) {\ if (likely(current_thread())) {\
MUTEX_ACQUIRE(&printf_mutex, false); \ MUTEX_ACQUIRE(&printf_mutex, false); \
} else { \ } else { \
while (MUTEX_TRY(&printf_mutex) == false) CPU_PAUSE(); \ while (MUTEX_TRY(&printf_mutex) == false) CPU_PAUSE(); \
@@ -26,7 +27,7 @@ extern mutex_t printf_mutex;
} }
#define __assert(x) \ #define __assert(x) \
if (!(x)){ \ if (unlikely(!(x))){ \
printf("\e[91m%s:%s:%d: %s failed\n\e[0m", __FILE__, __func__, __LINE__, #x); \ printf("\e[91m%s:%s:%d: %s failed\n\e[0m", __FILE__, __func__, __LINE__, #x); \
_panic(NULL, NULL); \ _panic(NULL, NULL); \
}; };
kernel-src/include/util.h
+3
View File
@@ -9,6 +9,9 @@
#define ROUND_DOWN(v, n) ((v) - ((v) % (n))) #define ROUND_DOWN(v, n) ((v) - ((v) % (n)))
#define ROUND_UP(v, n) ROUND_DOWN((v) + (n) - 1, n) #define ROUND_UP(v, n) ROUND_DOWN((v) + (n) - 1, n)
#define likely(x) __builtin_expect(!!(x), 1)
#define unlikely(x) __builtin_expect(!!(x), 0)
static inline long abs(long x) { static inline long abs(long x) {
return x < 0 ? -x : x; return x < 0 ? -x : x;
} }