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/***
This file is part of PulseAudio.
Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
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 2.1 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 <stdio.h>
#include <windows.h>
#include <pulse/xmalloc.h>
#include <pulsecore/log.h>
#include <pulsecore/once.h>
#include "thread.h"
struct pa_thread {
HANDLE thread;
pa_thread_func_t thread_func;
void *userdata;
};
struct pa_tls {
DWORD index;
pa_free_cb_t free_func;
};
struct pa_tls_monitor {
HANDLE thread;
pa_free_cb_t free_func;
void *data;
};
static pa_tls *thread_tls;
static pa_once thread_tls_once = PA_ONCE_INIT;
static pa_tls *monitor_tls;
static void thread_tls_once_func(void) {
thread_tls = pa_tls_new(NULL);
assert(thread_tls);
}
static DWORD WINAPI internal_thread_func(LPVOID param) {
pa_thread *t = param;
assert(t);
pa_run_once(&thread_tls_once, thread_tls_once_func);
pa_tls_set(thread_tls, t);
t->thread_func(t->userdata);
return 0;
}
pa_thread* pa_thread_new(pa_thread_func_t thread_func, void *userdata) {
pa_thread *t;
assert(thread_func);
t = pa_xnew(pa_thread, 1);
t->thread_func = thread_func;
t->userdata = userdata;
t->thread = CreateThread(NULL, 0, internal_thread_func, t, 0, NULL);
if (!t->thread) {
pa_xfree(t);
return NULL;
}
return t;
}
int pa_thread_is_running(pa_thread *t) {
DWORD code;
assert(t);
if (!GetExitCodeThread(t->thread, &code))
return 0;
return code == STILL_ACTIVE;
}
void pa_thread_free(pa_thread *t) {
assert(t);
pa_thread_join(t);
CloseHandle(t->thread);
pa_xfree(t);
}
int pa_thread_join(pa_thread *t) {
assert(t);
if (WaitForSingleObject(t->thread, INFINITE) == WAIT_FAILED)
return -1;
return 0;
}
pa_thread* pa_thread_self(void) {
pa_run_once(&thread_tls_once, thread_tls_once_func);
return pa_tls_get(thread_tls);
}
void pa_thread_yield(void) {
Sleep(0);
}
static DWORD WINAPI monitor_thread_func(LPVOID param) {
struct pa_tls_monitor *m = param;
assert(m);
WaitForSingleObject(m->thread, INFINITE);
CloseHandle(m->thread);
m->free_func(m->data);
pa_xfree(m);
return 0;
}
pa_tls* pa_tls_new(pa_free_cb_t free_cb) {
pa_tls *t;
t = pa_xnew(pa_tls, 1);
t->index = TlsAlloc();
t->free_func = free_cb;
if (t->index == TLS_OUT_OF_INDEXES) {
pa_xfree(t);
return NULL;
}
return t;
}
void pa_tls_free(pa_tls *t) {
assert(t);
TlsFree(t->index);
pa_xfree(t);
}
void *pa_tls_get(pa_tls *t) {
assert(t);
return TlsGetValue(t->index);
}
void *pa_tls_set(pa_tls *t, void *userdata) {
void *r;
assert(t);
r = TlsGetValue(t->index);
TlsSetValue(t->index, userdata);
if (t->free_func) {
struct pa_tls_monitor *m;
PA_ONCE_BEGIN {
monitor_tls = pa_tls_new(NULL);
assert(monitor_tls);
pa_tls_set(monitor_tls, NULL);
} PA_ONCE_END;
m = pa_tls_get(monitor_tls);
if (!m) {
HANDLE thread;
m = pa_xnew(struct pa_tls_monitor, 1);
DuplicateHandle(GetCurrentProcess(), GetCurrentThread(),
GetCurrentProcess(), &m->thread, 0, FALSE,
DUPLICATE_SAME_ACCESS);
m->free_func = t->free_func;
pa_tls_set(monitor_tls, m);
thread = CreateThread(NULL, 0, monitor_thread_func, m, 0, NULL);
assert(thread);
CloseHandle(thread);
}
m->data = userdata;
}
return r;
}
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