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/*
* blogc: A blog compiler.
* Copyright (C) 2014-2018 Rafael G. Martins <rafael@rafaelmartins.eng.br>
*
* This program can be distributed under the terms of the BSD License.
* See the file LICENSE.
*/
#include <stdbool.h>
#include <windows.h>
#include "error.h"
#include "utils.h"
#include "thread.h"
struct _bc_thread_t {
HANDLE thread;
};
struct wrapper_arg {
bc_thread_func_t func;
void *arg;
};
static DWORD WINAPI
wrapper(LPVOID arg)
{
if (arg != NULL) {
struct wrapper_arg *r = arg;
r->func(r->arg);
free(r);
}
return 0;
}
bc_thread_t*
bc_thread_create(bc_thread_func_t func, void *arg, bool detached, bc_error_t **err)
{
if (err == NULL || *err != NULL)
return NULL;
struct wrapper_arg *a = bc_malloc(sizeof(struct wrapper_arg));
a->func = func;
a->arg = arg;
bc_thread_t *rv = bc_malloc(sizeof(bc_thread_t));
rv->thread = CreateThread(NULL, 0, wrapper, a, 0, NULL);
if (rv->thread == NULL) {
LPTSTR buf;
FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
NULL, GetLastError(), MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPTSTR)&buf, 0, NULL);
*err = bc_error_new_printf(BC_ERROR_THREAD,
"Failed to create thread: %s", buf);
LocalFree(buf);
free(rv);
free(a);
return NULL;
}
if (detached && !CloseHandle(rv->thread)) {
LPTSTR buf;
FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
NULL, GetLastError(), MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPTSTR)&buf, 0, NULL);
*err = bc_error_new_printf(BC_ERROR_THREAD,
"Failed to detach thread: %s", buf);
LocalFree(buf);
free(rv);
free(a);
return NULL;
}
return rv;
}
void
bc_thread_join(bc_thread_t *thread, bc_error_t **err)
{
if (thread == NULL || err == NULL || *err != NULL)
return;
DWORD r = WaitForSingleObject(thread->thread, INFINITE);
switch (r) {
case WAIT_OBJECT_0:
break;
case WAIT_FAILED:
{
LPTSTR buf;
FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
NULL, GetLastError(), MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPTSTR)&buf, 0, NULL);
*err = bc_error_new_printf(BC_ERROR_THREAD,
"Failed to join thread: %s", buf);
LocalFree(buf);
break;
}
default:
*err = bc_error_new_printf(BC_ERROR_THREAD, "Failed to join thread");
break;
}
}
void
bc_thread_free(bc_thread_t *thread)
{
free(thread);
}
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