From 4413b89d7a45587b545a31463ad2196767f45563 Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Thu, 25 May 2006 17:16:55 +0000
Subject: * split pa_cstrerror() into its own file polypcore/core-error.[ch] *
 fix building of padsp * remove a warning when compiling padsp.c

git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@972 fefdeb5f-60dc-0310-8127-8f9354f1896f
---
 src/polypcore/core-error.c | 205 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 205 insertions(+)
 create mode 100644 src/polypcore/core-error.c

(limited to 'src/polypcore/core-error.c')

diff --git a/src/polypcore/core-error.c b/src/polypcore/core-error.c
new file mode 100644
index 00000000..f2240a9f
--- /dev/null
+++ b/src/polypcore/core-error.c
@@ -0,0 +1,205 @@
+/* $Id$ */
+
+/***
+  This file is part of polypaudio.
+ 
+  polypaudio 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.
+ 
+  polypaudio 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 polypaudio; 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 <polyp/utf8.h>
+#include <polyp/xmalloc.h>
+
+#include <polypcore/core-util.h>
+#include <polypcore/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, "polypaudio%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;
+}
-- 
cgit