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/* $Id$ */
/***
This file is part of PulseAudio.
PulseAudio is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.
PulseAudio 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 Lesser General Public License
along with PulseAudio; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef HAVE_PTHREAD
#include <pthread.h>
#endif
#ifdef HAVE_WINDOWS_H
#include <windows.h>
#endif
#include <pulse/utf8.h>
#include <pulse/xmalloc.h>
#include <pulsecore/core-util.h>
#include <pulsecore/native-common.h>
#include "core-error.h"
#ifdef HAVE_PTHREAD
static pthread_once_t cstrerror_once = PTHREAD_ONCE_INIT;
static pthread_key_t tlsstr_key;
static void inittls(void) {
int ret;
ret = pthread_key_create(&tlsstr_key, pa_xfree);
if (ret) {
fprintf(stderr, __FILE__ ": CRITICAL: Unable to allocate TLS key (%d)\n", errno);
exit(-1);
}
}
#elif HAVE_WINDOWS_H
static DWORD tlsstr_key = TLS_OUT_OF_INDEXES;
static DWORD monitor_key = TLS_OUT_OF_INDEXES;
static void inittls(void) {
HANDLE mutex;
char name[64];
sprintf(name, "pulse%d", (int)GetCurrentProcessId());
mutex = CreateMutex(NULL, FALSE, name);
if (!mutex) {
fprintf(stderr, __FILE__ ": CRITICAL: Unable to create named mutex (%d)\n", (int)GetLastError());
exit(-1);
}
WaitForSingleObject(mutex, INFINITE);
if (tlsstr_key == TLS_OUT_OF_INDEXES) {
tlsstr_key = TlsAlloc();
monitor_key = TlsAlloc();
if ((tlsstr_key == TLS_OUT_OF_INDEXES) || (monitor_key == TLS_OUT_OF_INDEXES)) {
fprintf(stderr, __FILE__ ": CRITICAL: Unable to allocate TLS key (%d)\n", (int)GetLastError());
exit(-1);
}
}
ReleaseMutex(mutex);
CloseHandle(mutex);
}
/*
* This is incredibly brain dead, but this is necessary when dealing with
* the hell that is Win32.
*/
struct monitor_data {
HANDLE thread;
void *data;
};
static DWORD WINAPI monitor_thread(LPVOID param) {
struct monitor_data *data;
data = (struct monitor_data*)param;
assert(data);
WaitForSingleObject(data->thread, INFINITE);
CloseHandle(data->thread);
pa_xfree(data->data);
pa_xfree(data);
return 0;
}
static void start_monitor(void) {
HANDLE thread;
struct monitor_data *data;
data = pa_xnew(struct monitor_data, 1);
assert(data);
DuplicateHandle(GetCurrentProcess(), GetCurrentThread(),
GetCurrentProcess(), &data->thread, 0, FALSE, DUPLICATE_SAME_ACCESS);
thread = CreateThread(NULL, 0, monitor_thread, data, 0, NULL);
assert(thread);
TlsSetValue(monitor_key, data);
CloseHandle(thread);
}
#else
/* Unsafe, but we have no choice */
static char *tlsstr;
#endif
const char* pa_cstrerror(int errnum) {
const char *origbuf;
#ifdef HAVE_STRERROR_R
char errbuf[128];
#endif
#ifdef HAVE_PTHREAD
char *tlsstr;
pthread_once(&cstrerror_once, inittls);
tlsstr = pthread_getspecific(tlsstr_key);
#elif defined(HAVE_WINDOWS_H)
char *tlsstr;
struct monitor_data *data;
inittls();
tlsstr = TlsGetValue(tlsstr_key);
if (!tlsstr)
start_monitor();
data = TlsGetValue(monitor_key);
#endif
if (tlsstr)
pa_xfree(tlsstr);
#ifdef HAVE_STRERROR_R
#ifdef __GLIBC__
origbuf = strerror_r(errnum, errbuf, sizeof(errbuf));
if (origbuf == NULL)
origbuf = "";
#else
if (strerror_r(errnum, errbuf, sizeof(errbuf)) == 0) {
origbuf = errbuf;
errbuf[sizeof(errbuf) - 1] = '\0';
} else
origbuf = "";
#endif
#else
/* This might not be thread safe, but we hope for the best */
origbuf = strerror(errnum);
#endif
tlsstr = pa_locale_to_utf8(origbuf);
if (!tlsstr) {
fprintf(stderr, "Unable to convert, filtering\n");
tlsstr = pa_utf8_filter(origbuf);
}
#ifdef HAVE_PTHREAD
pthread_setspecific(tlsstr_key, tlsstr);
#elif defined(HAVE_WINDOWS_H)
TlsSetValue(tlsstr_key, tlsstr);
data->data = tlsstr;
#endif
return tlsstr;
}
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