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/*
*
* Copyright 2016 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#include <grpc/support/port_platform.h>
#ifdef GPR_WINDOWS_SUBPROCESS
#include <string.h>
#include <tchar.h>
#include <windows.h>
#include <grpc/support/alloc.h>
#include <grpc/support/log.h>
#include <grpc/support/subprocess.h>
#include "src/core/lib/gpr/string.h"
#include "src/core/lib/gpr/string_windows.h"
struct gpr_subprocess {
PROCESS_INFORMATION pi;
int joined;
int interrupted;
};
const char* gpr_subprocess_binary_extension() { return ".exe"; }
gpr_subprocess* gpr_subprocess_create(int argc, const char** argv) {
gpr_subprocess* r;
STARTUPINFO si;
PROCESS_INFORMATION pi;
char* args = gpr_strjoin_sep(argv, (size_t)argc, " ", NULL);
TCHAR* args_tchar;
args_tchar = gpr_char_to_tchar(args);
gpr_free(args);
memset(&si, 0, sizeof(si));
si.cb = sizeof(si);
memset(&pi, 0, sizeof(pi));
if (!CreateProcess(NULL, args_tchar, NULL, NULL, FALSE,
CREATE_NEW_PROCESS_GROUP, NULL, NULL, &si, &pi)) {
gpr_free(args_tchar);
return NULL;
}
gpr_free(args_tchar);
r = (gpr_subprocess*)gpr_malloc(sizeof(gpr_subprocess));
memset(r, 0, sizeof(*r));
r->pi = pi;
return r;
}
void gpr_subprocess_destroy(gpr_subprocess* p) {
if (p) {
if (!p->joined) {
gpr_subprocess_interrupt(p);
gpr_subprocess_join(p);
}
if (p->pi.hProcess) {
CloseHandle(p->pi.hProcess);
}
if (p->pi.hThread) {
CloseHandle(p->pi.hThread);
}
gpr_free(p);
}
}
int gpr_subprocess_join(gpr_subprocess* p) {
DWORD dwExitCode;
if (GetExitCodeProcess(p->pi.hProcess, &dwExitCode)) {
if (dwExitCode == STILL_ACTIVE) {
if (WaitForSingleObject(p->pi.hProcess, INFINITE) == WAIT_OBJECT_0) {
p->joined = 1;
goto getExitCode;
}
return -1; // failed to join
} else {
goto getExitCode;
}
} else {
return -1; // failed to get exit code
}
getExitCode:
if (p->interrupted) {
return 0;
}
if (GetExitCodeProcess(p->pi.hProcess, &dwExitCode)) {
return (int)dwExitCode;
} else {
return -1; // failed to get exit code
}
}
void gpr_subprocess_interrupt(gpr_subprocess* p) {
DWORD dwExitCode;
if (GetExitCodeProcess(p->pi.hProcess, &dwExitCode)) {
if (dwExitCode == STILL_ACTIVE) {
gpr_log(GPR_INFO, "sending ctrl-break");
GenerateConsoleCtrlEvent(CTRL_BREAK_EVENT, p->pi.dwProcessId);
p->joined = 1;
p->interrupted = 1;
}
}
return;
}
#endif /* GPR_WINDOWS_SUBPROCESS */
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