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#include "cru/base/SubProcess.h"
#include <thread>
#ifdef CRU_PLATFORM_UNIX
#include "cru/base/platform/unix/PosixSpawnSubProcess.h"
#endif
namespace cru {
PlatformSubProcess::PlatformSubProcess(
SubProcessStartInfo start_info,
std::shared_ptr<IPlatformSubProcessImpl> impl)
: state_(new State(std::move(start_info), std::move(impl))),
lock_(state_->mutex, std::defer_lock) {}
PlatformSubProcess::~PlatformSubProcess() {}
void PlatformSubProcess::Start() {
std::lock_guard lock_guard(this->lock_);
if (this->state_->status != SubProcessStatus::Prepare) {
throw SubProcessException(u"The process has already tried to start.");
}
try {
this->state_->impl->PlatformCreateProcess(this->state_->start_info);
this->state_->status = SubProcessStatus::Running;
auto thread = std::thread([state = state_] {
std::unique_lock lock(state->mutex);
state->exit_result = state->impl->PlatformWaitForProcess();
state->status = SubProcessStatus::Exited;
state->condition_variable.notify_all();
});
thread.detach();
} catch (const std::exception& e) {
this->state_->status = SubProcessStatus::FailedToStart;
throw SubProcessFailedToStartException(u"Sub-process failed to start. " +
String::FromUtf8(e.what()));
}
}
void PlatformSubProcess::Wait(
std::optional<std::chrono::milliseconds> wait_time) {
std::lock_guard lock_guard(this->lock_);
if (this->state_->status == SubProcessStatus::Prepare) {
throw SubProcessException(
u"The process does not start. Can't wait for it.");
}
if (this->state_->status == SubProcessStatus::FailedToStart) {
throw SubProcessException(
u"The process failed to start. Can't wait for it.");
}
if (this->state_->status == SubProcessStatus::Exited) {
return;
}
auto predicate = [this] {
return this->state_->status == SubProcessStatus::Exited;
};
if (wait_time) {
this->state_->condition_variable.wait_for(this->lock_, *wait_time,
predicate);
} else {
this->state_->condition_variable.wait(this->lock_, predicate);
}
}
void PlatformSubProcess::Kill() {
std::lock_guard lock_guard(this->lock_);
if (this->state_->status == SubProcessStatus::Prepare) {
throw SubProcessException(u"The process does not start. Can't kill it.");
}
if (this->state_->status == SubProcessStatus::FailedToStart) {
throw SubProcessException(u"The process failed to start. Can't kill it.");
}
if (this->state_->status == SubProcessStatus::Exited) {
return;
}
if (this->state_->killed) {
return;
}
this->state_->impl->PlatformKillProcess();
this->state_->killed = true;
}
SubProcessStatus PlatformSubProcess::GetStatus() {
std::lock_guard lock_guard(this->lock_);
return this->state_->status;
}
SubProcessExitResult PlatformSubProcess::GetExitResult() {
std::lock_guard lock_guard(this->lock_);
if (this->state_->status == SubProcessStatus::Prepare) {
throw SubProcessException(
u"The process does not start. Can't get exit result.");
}
if (this->state_->status == SubProcessStatus::FailedToStart) {
throw SubProcessException(
u"The process failed to start. Can't get exit result.");
}
if (this->state_->status == SubProcessStatus::Running) {
throw SubProcessException(
u"The process is running. Can't get exit result.");
}
return this->state_->exit_result;
}
io::Stream* PlatformSubProcess::GetStdinStream() {
return this->state_->impl->GetStdinStream();
}
io::Stream* PlatformSubProcess::GetStdoutStream() {
return this->state_->impl->GetStdoutStream();
}
io::Stream* PlatformSubProcess::GetStderrStream() {
return this->state_->impl->GetStderrStream();
}
SubProcess SubProcess::Create(String program, std::vector<String> arguments,
std::unordered_map<String, String> environments) {
SubProcessStartInfo start_info;
start_info.program = std::move(program);
start_info.arguments = std::move(arguments);
start_info.environments = std::move(environments);
return SubProcess(std::move(start_info));
}
SubProcessExitResult SubProcess::Call(
String program, std::vector<String> arguments,
std::unordered_map<String, String> environments) {
auto process =
Create(std::move(program), std::move(arguments), std::move(environments));
process.Wait();
return process.GetExitResult();
}
SubProcess::SubProcess(SubProcessStartInfo start_info) {
#ifdef CRU_PLATFORM_UNIX
platform_process_.reset(new PlatformSubProcess(
std::move(start_info),
std::make_shared<platform::unix::PosixSpawnSubProcessImpl>()));
#else
NotImplemented();
#endif
platform_process_->Start();
}
SubProcess::~SubProcess() {}
void SubProcess::Wait(std::optional<std::chrono::milliseconds> wait_time) {
CheckValid();
platform_process_->Wait(wait_time);
}
void SubProcess::Kill() {
CheckValid();
platform_process_->Kill();
}
SubProcessStatus SubProcess::GetStatus() {
CheckValid();
return platform_process_->GetStatus();
}
SubProcessExitResult SubProcess::GetExitResult() {
CheckValid();
return platform_process_->GetExitResult();
}
io::Stream* SubProcess::GetStdinStream() {
CheckValid();
return platform_process_->GetStdinStream();
}
io::Stream* SubProcess::GetStdoutStream() {
CheckValid();
return platform_process_->GetStdoutStream();
}
io::Stream* SubProcess::GetStderrStream() {
CheckValid();
return platform_process_->GetStderrStream();
}
void SubProcess::Detach() { auto p = platform_process_.release(); }
void SubProcess::CheckValid() const {
if (!IsValid()) {
throw SubProcessException(u"SubProcess instance is invalid.");
}
}
} // namespace cru
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