summaryrefslogtreecommitdiffstats
path: root/src/pulsecore/core-error.c
blob: e42070d17d465672f995fd059060e28495bad35e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
/* $Id$ */

/***
  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, "pulseaudio%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;
}