| 36,7 → 36,11 |
|---|
| #include <stdio.h> |
| #include <unistd.h> |
| #include <io/printf_core.h> |
| #include <futex.h> |
| #include <async.h> |
| |
| static atomic_t printf_futex = FUTEX_INITIALIZER; |
| |
| static int vprintf_write(const char *str, size_t count, void *unused) |
| { |
| return write(1, str, count); |
| 49,10 → 53,22 |
|---|
| */ |
| int vprintf(const char *fmt, va_list ap) |
| { |
| struct printf_spec ps = {(int(*)(void *, size_t, void *)) vprintf_write, NULL}; |
| |
| struct printf_spec ps = { |
| (int (*)(void *, size_t, void *)) vprintf_write, |
| NULL |
| }; |
| /* |
| * Prevent other threads to execute printf_core() |
| */ |
| futex_down(&printf_futex); |
| /* |
| * Prevent other pseudo threads of the same thread |
| * to execute printf_core() |
| */ |
| async_serialize_start(); |
| int ret = printf_core(fmt, &ps, ap); |
| |
| async_serialize_end(); |
| futex_up(&printf_futex); |
| return ret; |
| } |
| |