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compat.h
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compat.h
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/*
* Copyright 2012-2013 Luke Dashjr
*
* 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 3 of the License, or (at your option)
* any later version. See COPYING for more details.
*/
#ifndef BFG_COMPAT_H
#define BFG_COMPAT_H
#include "config.h"
#include <stdbool.h>
#if !(defined(WIN32) || defined(unix))
#define unix
#endif
#if defined(LL_FOREACH) && !defined(LL_FOREACH2)
// Missing from uthash before 1.9.7
#define LL_DELETE2(head,del,next) \
do { \
LDECLTYPE(head) _tmp; \
if ((head) == (del)) { \
(head)=(head)->next; \
} else { \
_tmp = head; \
while (_tmp->next && (_tmp->next != (del))) { \
_tmp = _tmp->next; \
} \
if (_tmp->next) { \
_tmp->next = ((del)->next); \
} \
} \
} while (0)
#define LL_FOREACH2(head,el,next) \
for(el=head;el;el=(el)->next)
#define LL_FOREACH_SAFE2(head,el,tmp,next) \
for((el)=(head);(el) && (tmp = (el)->next, 1); (el) = tmp)
#define LL_PREPEND2(head,add,next) \
do { \
(add)->next = head; \
head = add; \
} while (0)
#endif
#ifdef WIN32
#include <errno.h>
#include <fcntl.h>
#include <time.h>
#include <pthread.h>
#include <sys/time.h>
#include <windows.h>
#ifndef __maybe_unused
#define __maybe_unused __attribute__((unused))
#endif
#ifndef timersub
#define timersub(a, b, result) \
do { \
(result)->tv_sec = (a)->tv_sec - (b)->tv_sec; \
(result)->tv_usec = (a)->tv_usec - (b)->tv_usec; \
if ((result)->tv_usec < 0) { \
--(result)->tv_sec; \
(result)->tv_usec += 1000000; \
} \
} while (0)
#endif
#ifndef timeradd
# define timeradd(a, b, result) \
do { \
(result)->tv_sec = (a)->tv_sec + (b)->tv_sec; \
(result)->tv_usec = (a)->tv_usec + (b)->tv_usec; \
if ((result)->tv_usec >= 1000000) \
{ \
++(result)->tv_sec; \
(result)->tv_usec -= 1000000; \
} \
} while (0)
#endif
// Some versions of MingW define this, but don't handle the timeval.tv_sec case that we use
#ifdef localtime_r
#undef localtime_r
#endif
// localtime is thread-safe on Windows
// We also use this with timeval.tv_sec, which is incorrectly smaller than time_t on Windows
// Need to cast to time_t* to suppress warning - actual problem shouldn't be possible in practice
#define localtime_r(timep, result) ( \
memcpy(result, \
( \
(sizeof(*timep) == sizeof(time_t)) \
? localtime((time_t*)timep) \
: localtime_convert(*timep) \
), \
sizeof(*result) \
) \
)
static inline
struct tm *localtime_convert(time_t t)
{
return localtime(&t);
}
#endif
#ifndef HAVE_NANOSLEEP
extern void (*timer_set_now)(struct timeval *);
#define cgtime(tvp) timer_set_now(tvp)
static inline int nanosleep(const struct timespec *req, struct timespec *rem)
{
struct timeval tstart;
DWORD msecs;
cgtime(&tstart);
msecs = (req->tv_sec * 1000) + ((999999 + req->tv_nsec) / 1000000);
if (SleepEx(msecs, true) == WAIT_IO_COMPLETION) {
if (rem) {
struct timeval tdone, tnow, tleft;
tdone.tv_sec = tstart.tv_sec + req->tv_sec;
tdone.tv_usec = tstart.tv_usec + ((999 + req->tv_nsec) / 1000);
if (tdone.tv_usec > 1000000) {
tdone.tv_usec -= 1000000;
++tdone.tv_sec;
}
cgtime(&tnow);
if (timercmp(&tnow, &tdone, >))
return 0;
timersub(&tdone, &tnow, &tleft);
rem->tv_sec = tleft.tv_sec;
rem->tv_nsec = tleft.tv_usec * 1000;
}
errno = EINTR;
return -1;
}
return 0;
}
#undef cgtime
#endif
#ifndef HAVE_SLEEP
static inline int sleep(unsigned int secs)
{
struct timespec req, rem;
req.tv_sec = secs;
req.tv_nsec = 0;
if (!nanosleep(&req, &rem))
return 0;
return rem.tv_sec + (rem.tv_nsec ? 1 : 0);
}
#endif
#ifdef WIN32
enum {
PRIO_PROCESS = 0,
};
static inline int setpriority(__maybe_unused int which, __maybe_unused int who, __maybe_unused int prio)
{
return -!SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_IDLE);
}
typedef unsigned long int ulong;
typedef unsigned short int ushort;
typedef unsigned int uint;
#ifndef __SUSECONDS_T_TYPE
typedef long suseconds_t;
#endif
#endif /* WIN32 */
#ifndef HAVE_LOG2
# define log2(n) (log(n) / log(2))
#endif
#ifndef HAVE_PTHREAD_CANCEL
// Bionic (Android) is intentionally missing pthread_cancel, so it is implemented using pthread_kill (handled in util.c)
#include <pthread.h>
#include <signal.h>
#define pthread_cancel(pth) pthread_kill(pth, SIGTERM)
extern void pthread_testcancel(void);
#ifndef PTHREAD_CANCEL_ENABLE
#define PTHREAD_CANCEL_ENABLE 0
#define PTHREAD_CANCEL_DISABLE 1
#endif
#ifndef PTHREAD_CANCEL_DEFERRED
#define PTHREAD_CANCEL_DEFERRED 0
#define PTHREAD_CANCEL_ASYNCHRONOUS 1
#endif
#ifndef PTHREAD_CANCELED
#define PTHREAD_CANCELED ((void*)-1)
#endif
#endif
#endif /* __COMPAT_H__ */