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v/vlib/os/process_windows.c.v

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module os
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import strings
fn C.GenerateConsoleCtrlEvent(event u32, pgid u32) bool
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fn C.GetModuleHandleA(name &char) HMODULE
fn C.GetProcAddress(handle voidptr, procname &byte) voidptr
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fn C.TerminateProcess(process HANDLE, exit_code u32) bool
fn C.PeekNamedPipe(hNamedPipe voidptr, lpBuffer voidptr, nBufferSize int, lpBytesRead voidptr, lpTotalBytesAvail voidptr, lpBytesLeftThisMessage voidptr) bool
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type FN_NTSuspendResume = fn (voidptr)
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fn ntdll_fn(name &char) FN_NTSuspendResume {
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ntdll := C.GetModuleHandleA(c'NTDLL')
if ntdll == 0 {
return FN_NTSuspendResume(0)
}
the_fn := FN_NTSuspendResume(C.GetProcAddress(ntdll, name))
return the_fn
}
fn failed_cfn_report_error(ok bool, label string) {
if ok {
return
}
error_num := int(C.GetLastError())
error_msg := get_error_msg(error_num)
eprintln('failed $label: $error_msg')
exit(1)
}
type PU32 = &u32
// TODO: the PU32 alias is used to compensate for the wrong number of &/*
// that V does when doing: `h := &&u32(p)`, which should have casted
// p to a double pointer.
fn close_valid_handle(p voidptr) {
h := &PU32(p)
if *h != &u32(0) {
C.CloseHandle(*h)
unsafe {
*h = &u32(0)
}
}
}
pub struct WProcess {
pub mut:
proc_info ProcessInformation
command_line [65536]byte
child_stdin &u32
//
child_stdout_read &u32
child_stdout_write &u32
//
child_stderr_read &u32
child_stderr_write &u32
}
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fn (mut p Process) win_spawn_process() int {
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mut wdata := &WProcess{
child_stdin: 0
child_stdout_read: 0
child_stdout_write: 0
child_stderr_read: 0
child_stderr_write: 0
}
p.wdata = voidptr(wdata)
mut start_info := StartupInfo{
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lp_reserved2: 0
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lp_reserved: 0
lp_desktop: 0
lp_title: 0
cb: sizeof(C.PROCESS_INFORMATION)
}
if p.use_stdio_ctl {
mut sa := SecurityAttributes{}
sa.n_length = sizeof(C.SECURITY_ATTRIBUTES)
sa.b_inherit_handle = true
create_pipe_ok1 := C.CreatePipe(voidptr(&wdata.child_stdout_read), voidptr(&wdata.child_stdout_write),
voidptr(&sa), 0)
failed_cfn_report_error(create_pipe_ok1, 'CreatePipe stdout')
set_handle_info_ok1 := C.SetHandleInformation(wdata.child_stdout_read, C.HANDLE_FLAG_INHERIT,
0)
failed_cfn_report_error(set_handle_info_ok1, 'SetHandleInformation')
create_pipe_ok2 := C.CreatePipe(voidptr(&wdata.child_stderr_read), voidptr(&wdata.child_stderr_write),
voidptr(&sa), 0)
failed_cfn_report_error(create_pipe_ok2, 'CreatePipe stderr')
set_handle_info_ok2 := C.SetHandleInformation(wdata.child_stderr_read, C.HANDLE_FLAG_INHERIT,
0)
failed_cfn_report_error(set_handle_info_ok2, 'SetHandleInformation stderr')
start_info.h_std_input = wdata.child_stdin
start_info.h_std_output = wdata.child_stdout_write
start_info.h_std_error = wdata.child_stderr_write
start_info.dw_flags = u32(C.STARTF_USESTDHANDLES)
}
cmd := '$p.filename ' + p.args.join(' ')
C.ExpandEnvironmentStringsW(cmd.to_wide(), voidptr(&wdata.command_line[0]), 32768)
mut creation_flags := int(C.NORMAL_PRIORITY_CLASS)
if p.use_pgroup {
creation_flags |= C.CREATE_NEW_PROCESS_GROUP
}
create_process_ok := C.CreateProcessW(0, &wdata.command_line[0], 0, 0, C.TRUE, creation_flags,
0, 0, voidptr(&start_info), voidptr(&wdata.proc_info))
failed_cfn_report_error(create_process_ok, 'CreateProcess')
if p.use_stdio_ctl {
close_valid_handle(&wdata.child_stdout_write)
close_valid_handle(&wdata.child_stderr_write)
}
p.pid = int(wdata.proc_info.dw_process_id)
return p.pid
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}
fn (mut p Process) win_stop_process() {
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the_fn := ntdll_fn(c'NtSuspendProcess')
if voidptr(the_fn) == 0 {
return
}
wdata := &WProcess(p.wdata)
the_fn(wdata.proc_info.h_process)
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}
fn (mut p Process) win_resume_process() {
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the_fn := ntdll_fn(c'NtResumeProcess')
if voidptr(the_fn) == 0 {
return
}
wdata := &WProcess(p.wdata)
the_fn(wdata.proc_info.h_process)
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}
fn (mut p Process) win_kill_process() {
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wdata := &WProcess(p.wdata)
C.TerminateProcess(wdata.proc_info.h_process, 3)
}
fn (mut p Process) win_kill_pgroup() {
wdata := &WProcess(p.wdata)
C.GenerateConsoleCtrlEvent(C.CTRL_BREAK_EVENT, wdata.proc_info.dw_process_id)
C.Sleep(20)
C.TerminateProcess(wdata.proc_info.h_process, 3)
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}
fn (mut p Process) win_wait() {
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exit_code := u32(1)
mut wdata := &WProcess(p.wdata)
if p.wdata != 0 {
C.WaitForSingleObject(wdata.proc_info.h_process, C.INFINITE)
C.GetExitCodeProcess(wdata.proc_info.h_process, voidptr(&exit_code))
close_valid_handle(&wdata.child_stdin)
close_valid_handle(&wdata.child_stdout_write)
close_valid_handle(&wdata.child_stderr_write)
close_valid_handle(&wdata.proc_info.h_process)
close_valid_handle(&wdata.proc_info.h_thread)
}
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p.status = .exited
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p.code = int(exit_code)
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}
fn (mut p Process) win_is_alive() bool {
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exit_code := u32(0)
wdata := &WProcess(p.wdata)
C.GetExitCodeProcess(wdata.proc_info.h_process, voidptr(&exit_code))
if exit_code == C.STILL_ACTIVE {
return true
}
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return false
}
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///////////////
fn (mut p Process) win_write_string(idx int, s string) {
panic('Process.write_string $idx is not implemented yet')
}
fn (mut p Process) win_read_string(idx int, maxbytes int) (string, int) {
mut wdata := &WProcess(p.wdata)
if wdata == 0 {
return '', 0
}
mut rhandle := &u32(0)
if idx == 1 {
rhandle = wdata.child_stdout_read
}
if idx == 2 {
rhandle = wdata.child_stderr_read
}
if rhandle == 0 {
return '', 0
}
mut bytes_avail := int(0)
if !C.PeekNamedPipe(rhandle, voidptr(0), int(0), voidptr(0), &bytes_avail, voidptr(0)) {
return '', 0
}
if bytes_avail == 0 {
return '', 0
}
mut bytes_read := int(0)
buf := []byte{len: bytes_avail + 300}
unsafe {
C.ReadFile(rhandle, &buf[0], buf.cap, voidptr(&bytes_read), 0)
}
return buf[..bytes_read].bytestr(), bytes_read
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}
fn (mut p Process) win_slurp(idx int) string {
mut wdata := &WProcess(p.wdata)
if wdata == 0 {
return ''
}
mut rhandle := &u32(0)
if idx == 1 {
rhandle = wdata.child_stdout_read
}
if idx == 2 {
rhandle = wdata.child_stderr_read
}
if rhandle == 0 {
return ''
}
mut bytes_read := u32(0)
buf := [4096]byte{}
mut read_data := strings.new_builder(1024)
for {
mut result := false
unsafe {
result = C.ReadFile(rhandle, &buf[0], 1000, voidptr(&bytes_read), 0)
read_data.write_ptr(&buf[0], int(bytes_read))
}
if result == false || int(bytes_read) == 0 {
break
}
}
soutput := read_data.str()
unsafe { read_data.free() }
if idx == 1 {
close_valid_handle(&wdata.child_stdout_read)
}
if idx == 2 {
close_valid_handle(&wdata.child_stderr_read)
}
return soutput
}
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//
// these are here to make v_win.c/v.c generation work in all cases:
fn (mut p Process) unix_spawn_process() int {
return 0
}
fn (mut p Process) unix_stop_process() {
}
fn (mut p Process) unix_resume_process() {
}
fn (mut p Process) unix_kill_process() {
}
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fn (mut p Process) unix_kill_pgroup() {
}
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fn (mut p Process) unix_wait() {
}
fn (mut p Process) unix_is_alive() bool {
return false
}