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/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License v2 as published by the Free Software Foundation.
*
* 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 021110-1307, USA.
*/
#include <string.h>
#include <signal.h>
#include <stdlib.h>
#include "common/compat.h"
#ifdef __ANDROID__
/*
* Workaround for pthread_cancel() in Android, using pthread_kill() instead, as
* Android NDK does not support pthread_cancel().
*/
int pthread_setcanceltype(int type, int *oldtype) { return 0; }
int pthread_setcancelstate(int state, int *oldstate) { return 0; }
int pthread_cancel(pthread_t thread_id) {
int status;
status = btrfs_set_thread_exit_handler();
if (status == 0)
status = pthread_kill(thread_id, SIGUSR1);
return status;
}
void btrfs_thread_exit_handler(int sig) {
pthread_exit(0);
}
int btrfs_set_thread_exit_handler() {
struct sigaction actions;
memset(&actions, 0, sizeof(actions));
sigemptyset(&actions.sa_mask);
actions.sa_flags = 0;
actions.sa_handler = btrfs_thread_exit_handler;
return sigaction(SIGUSR1, &actions, NULL);
}
struct qsort_r_context {
int (*compare)(const void *a, const void *b, void *context);
void *arg;
};
#if __STDC_VERSION__ >= 201112L && !defined(__STDC_NO_THREADS__)
static _Thread_local struct qsort_r_context *qsort_r_ctx = NULL;
#else
static __thread struct qsort_r_context *qsort_r_ctx = NULL;
#endif
static int qsort_r_stub_compare(const void *a, const void *b)
{
return qsort_r_ctx->compare(a, b, qsort_r_ctx->arg);
}
void qsort_r(void *base, size_t nel, size_t width,
int (*compare)(const void *a, const void *b, void *context),
void *arg)
{
struct qsort_r_context ctx;
struct qsort_r_context *old_ctx;
if (nel == 0)
return;
ctx.compare = compare;
ctx.arg = arg;
old_ctx = qsort_r_ctx;
qsort_r_ctx = &ctx;
qsort(base, nel, width, qsort_r_stub_compare);
/* Restore the old context after qsort is finished. */
qsort_r_ctx = old_ctx;
}
#endif
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