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|
/*
+----------------------------------------------------------------------+
| Copyright (c) The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| https://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Author: Anatol Belski <ab@php.net> |
+----------------------------------------------------------------------+
*/
#include "php.h"
#include "SAPI.h"
#include "win32/console.h"
/* true globals; only used from main thread and from kernel callback */
static zval ctrl_handler;
static DWORD ctrl_evt = (DWORD)-1;
static zend_atomic_bool *vm_interrupt_flag = NULL;
static void (*orig_interrupt_function)(zend_execute_data *execute_data);
static void php_win32_signal_ctrl_interrupt_function(zend_execute_data *execute_data)
{/*{{{*/
if (IS_UNDEF != Z_TYPE(ctrl_handler)) {
zval retval, params[1];
ZVAL_LONG(¶ms[0], ctrl_evt);
/* If the function returns, */
call_user_function(NULL, NULL, &ctrl_handler, &retval, 1, params);
zval_ptr_dtor(&retval);
}
if (orig_interrupt_function) {
orig_interrupt_function(execute_data);
}
}/*}}}*/
PHP_WINUTIL_API void php_win32_signal_ctrl_handler_init(void)
{/*{{{*/
/* We are in the main thread! */
if (!php_win32_console_is_cli_sapi()) {
return;
}
orig_interrupt_function = zend_interrupt_function;
zend_interrupt_function = php_win32_signal_ctrl_interrupt_function;
vm_interrupt_flag = &EG(vm_interrupt);
ZVAL_UNDEF(&ctrl_handler);
REGISTER_MAIN_LONG_CONSTANT("PHP_WINDOWS_EVENT_CTRL_C", CTRL_C_EVENT, CONST_PERSISTENT);
REGISTER_MAIN_LONG_CONSTANT("PHP_WINDOWS_EVENT_CTRL_BREAK", CTRL_BREAK_EVENT, CONST_PERSISTENT);
}/*}}}*/
PHP_WINUTIL_API void php_win32_signal_ctrl_handler_shutdown(void)
{/*{{{*/
if (!php_win32_console_is_cli_sapi()) {
return;
}
zend_interrupt_function = orig_interrupt_function;
orig_interrupt_function = NULL;
vm_interrupt_flag = NULL;
}/*}}}*/
PHP_WINUTIL_API void php_win32_signal_ctrl_handler_request_shutdown(void)
{
/* Must be initialized and in main thread */
if (!vm_interrupt_flag) {
return;
}
#ifdef ZTS
if (!tsrm_is_main_thread()) {
return;
}
#endif
/* The ctrl_handler must be cleared between requests, otherwise we can crash
* due to accessing a previous request's memory. */
if (!Z_ISUNDEF(ctrl_handler)) {
zval_ptr_dtor(&ctrl_handler);
ZVAL_UNDEF(&ctrl_handler);
}
}
static BOOL WINAPI php_win32_signal_system_ctrl_handler(DWORD evt)
{/*{{{*/
if (CTRL_C_EVENT != evt && CTRL_BREAK_EVENT != evt) {
return FALSE;
}
zend_atomic_bool_store_ex(vm_interrupt_flag, true);
ctrl_evt = evt;
return TRUE;
}/*}}}*/
/* {{{ Assigns a CTRL signal handler to a PHP function */
PHP_FUNCTION(sapi_windows_set_ctrl_handler)
{
zend_fcall_info fci;
zend_fcall_info_cache fcc;
bool add = 1;
/* callable argument corresponds to the CTRL handler */
if (zend_parse_parameters(ZEND_NUM_ARGS(), "f!|b", &fci, &fcc, &add) == FAILURE) {
RETURN_THROWS();
}
#ifdef ZTS
if (!tsrm_is_main_thread()) {
zend_throw_error(NULL, "CTRL events can only be received on the main thread");
RETURN_THROWS();
}
#endif
if (!php_win32_console_is_cli_sapi()) {
zend_throw_error(NULL, "CTRL events trapping is only supported on console");
RETURN_THROWS();
}
if (!ZEND_FCI_INITIALIZED(fci)) {
zval_ptr_dtor(&ctrl_handler);
ZVAL_UNDEF(&ctrl_handler);
if (!SetConsoleCtrlHandler(NULL, add)) {
RETURN_FALSE;
}
RETURN_TRUE;
}
if (!SetConsoleCtrlHandler(NULL, FALSE) || !SetConsoleCtrlHandler(php_win32_signal_system_ctrl_handler, add)) {
zend_string *func_name = zend_get_callable_name(&fci.function_name);
php_error_docref(NULL, E_WARNING, "Unable to attach %s as a CTRL handler", ZSTR_VAL(func_name));
zend_string_release_ex(func_name, 0);
RETURN_FALSE;
}
zval_ptr_dtor(&ctrl_handler);
ZVAL_COPY(&ctrl_handler, &fci.function_name);
RETURN_TRUE;
}/*}}}*/
PHP_FUNCTION(sapi_windows_generate_ctrl_event)
{/*{{{*/
zend_long evt, pid = 0;
bool ret = 0;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "l|l", &evt, &pid) == FAILURE) {
RETURN_THROWS();
}
if (!php_win32_console_is_cli_sapi()) {
zend_throw_error(NULL, "CTRL events trapping is only supported on console");
return;
}
SetConsoleCtrlHandler(NULL, TRUE);
ret = (GenerateConsoleCtrlEvent(evt, pid) != 0);
if (IS_UNDEF != Z_TYPE(ctrl_handler)) {
ret = ret && SetConsoleCtrlHandler(php_win32_signal_system_ctrl_handler, TRUE);
}
RETURN_BOOL(ret);
}/*}}}*/
|
