mpd/src/utils.h
Laszlo Ashin 457a6f4bee utils: introduce assert_static()
assert_static() will help us to find false asserts in compile time. Of
course it only works in case of expressions which can be evaluated
compile time. It cannot be used in global scope.
2008-11-22 14:28:11 +01:00

113 lines
2.7 KiB
C

/* the Music Player Daemon (MPD)
* Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
* This project's homepage is: http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef MPD_UTILS_H
#define MPD_UTILS_H
#include "gcc.h"
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <pthread.h>
#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
#ifndef assert_static
/* Compile time assertion developed by Ralf Holly */
/* http://pera-software.com/articles/compile-time-assertions.pdf */
#define assert_static(e) \
do { \
enum { assert_static__ = 1/(e) }; \
} while (0)
#endif /* !assert_static */
char *myFgets(char *buffer, int bufferSize, FILE * fp);
void stripReturnChar(char *string);
void my_usleep(long usec);
int ipv6Supported(void);
/* trivial functions, keep them inlined */
static inline void xclose(int fd)
{
while (close(fd) && errno == EINTR);
}
static inline ssize_t xread(int fd, void *buf, size_t len)
{
ssize_t nr;
while (1) {
nr = read(fd, buf, len);
if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
continue;
return nr;
}
}
static inline ssize_t xwrite(int fd, const void *buf, size_t len)
{
ssize_t nr;
while (1) {
nr = write(fd, buf, len);
if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
continue;
return nr;
}
}
mpd_malloc char *xstrdup(const char *s);
mpd_malloc void *xmalloc(size_t size);
mpd_malloc void *xrealloc(void *ptr, size_t size);
mpd_malloc void *xcalloc(size_t nmemb, size_t size);
/**
* free a const pointer - unfortunately free() expects a non-const
* pointer, for whatever reason
*/
static inline void xfree(const void *p)
{
union {
const void *in;
void *out;
} deconst = { .in = p };
free(deconst.out);
}
char *parsePath(char *path);
int set_nonblocking(int fd);
void init_async_pipe(int file_des[2]);
void xpthread_mutex_init(pthread_mutex_t *m, const pthread_mutexattr_t *a);
void xpthread_cond_init(pthread_cond_t *c, pthread_condattr_t *a);
void xpthread_mutex_destroy(pthread_mutex_t *mutex);
void xpthread_cond_destroy(pthread_cond_t *cond);
#endif