| 1,5 → 1,6 |
|---|
| /* |
| * Copyright (c) 2006 Josef Cejka |
| * Copyright (c) 2008 Jakub Jermar |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| 34,41 → 35,35 |
|---|
| |
| #include <stdarg.h> |
| #include <stdio.h> |
| #include <unistd.h> |
| #include <stdlib.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) |
| static int asprintf_prewrite(const char *str, size_t count, void *unused) |
| { |
| return write_stdout(str, count); |
| return count; |
| } |
| |
| /** Print formatted text. |
| * @param fmt format string |
| * @param ap format parameters |
| * \see For more details about format string see printf_core. |
| */ |
| int vprintf(const char *fmt, va_list ap) |
| int asprintf(char **strp, const char *fmt, ...) |
| { |
| struct printf_spec ps = { |
| (int (*)(void *, size_t, void *)) vprintf_write, |
| asprintf_prewrite, |
| 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); |
| int ret; |
| va_list args; |
| |
| va_start(args, fmt); |
| ret = printf_core(fmt, &ps, args); |
| va_end(args); |
| if (ret > 0) { |
| *strp = malloc(ret + 20); |
| if (!*strp) |
| return -1; |
| va_start(args, fmt); |
| vsprintf(*strp, fmt, args); |
| va_end(args); |
| } |
| |
| return ret; |
| } |
| |