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#include "cru/common/SubProcess.h"
#include <exception>
#include "cru/common/Exception.h"
#include "cru/common/log/Logger.h"
#ifdef CRU_PLATFORM_UNIX
#include "cru/common/platform/unix/PosixSpawnSubProcess.h"
#endif
#include <mutex>
namespace cru {
PlatformSubProcessBase::PlatformSubProcessBase(SubProcessStartInfo start_info)
: start_info_(std::move(start_info)),
delete_self_(false),
process_lock_(process_mutex_, std::defer_lock) {}
PlatformSubProcessBase::~PlatformSubProcessBase() {
std::lock_guard lock_guard(process_lock_);
if (status_ == SubProcessStatus::Running) {
CRU_LOG_ERROR(
u"PlatformSubProcessBase is destroyed but process is still running.");
std::terminate();
}
}
void PlatformSubProcessBase::Start() {
std::lock_guard lock_guard(process_lock_);
if (status_ != SubProcessStatus::Prepare) {
throw SubProcessException(u"The process has already tried to start.");
}
try {
PlatformCreateProcess();
status_ = SubProcessStatus::Running;
process_thread_ = std::thread([this] {
auto exit_result = PlatformWaitForProcess();
{
std::lock_guard lock_guard(process_lock_);
exit_result_ = std::move(exit_result);
status_ = SubProcessStatus::Exited;
}
this->process_condition_variable_.notify_all();
if (this->delete_self_) {
delete this;
}
});
process_thread_.detach();
} catch (const std::exception& e) {
status_ = SubProcessStatus::FailedToStart;
throw SubProcessFailedToStartException(u"Sub-process failed to start. " +
String::FromUtf8(e.what()));
}
}
void PlatformSubProcessBase::Wait(
std::optional<std::chrono::milliseconds> wait_time) {
std::lock_guard lock_guard(process_lock_);
if (status_ == SubProcessStatus::Prepare) {
throw SubProcessException(
u"The process does not start. Can't wait for it.");
}
if (status_ == SubProcessStatus::FailedToStart) {
throw SubProcessException(
u"The process failed to start. Can't wait for it.");
}
if (status_ == SubProcessStatus::Exited) {
return;
}
auto predicate = [this] { return status_ == SubProcessStatus::Exited; };
if (wait_time) {
process_condition_variable_.wait_for(process_lock_, *wait_time, predicate);
} else {
process_condition_variable_.wait(process_lock_, predicate);
}
}
void PlatformSubProcessBase::Kill() {
std::lock_guard data_lock_guard(process_lock_);
if (status_ == SubProcessStatus::Prepare) {
throw SubProcessException(u"The process does not start. Can't kill it.");
}
if (status_ == SubProcessStatus::FailedToStart) {
throw SubProcessException(u"The process failed to start. Can't kill it.");
}
if (status_ == SubProcessStatus::Exited) {
return;
}
PlatformKillProcess();
}
SubProcessStatus PlatformSubProcessBase::GetStatus() {
std::lock_guard data_lock_guard(process_lock_);
return status_;
}
SubProcessExitResult PlatformSubProcessBase::GetExitResult() {
std::lock_guard lock_guard(process_lock_);
if (status_ == SubProcessStatus::Prepare) {
throw SubProcessException(
u"The process does not start. Can't get exit result.");
}
if (status_ == SubProcessStatus::FailedToStart) {
throw SubProcessException(
u"The process failed to start. Can't get exit result.");
}
if (status_ == SubProcessStatus::Running) {
throw SubProcessException(
u"The process is running. Can't get exit result.");
}
return exit_result_;
}
void PlatformSubProcessBase::SetDeleteSelfOnExit(bool enable) {
std::lock_guard lock_guard(process_lock_);
delete_self_ = enable;
}
#ifdef CRU_PLATFORM_UNIX
using PlatformSubProcess = platform::unix::PosixSpawnSubProcess;
#endif
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));
}
SubProcess::SubProcess(SubProcessStartInfo start_info) {
platform_process_.reset(new PlatformSubProcess(std::move(start_info)));
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();
p->SetDeleteSelfOnExit(true);
}
void SubProcess::CheckValid() const {
if (!IsValid()) {
throw SubProcessException(u"SubProcess instance is invalid.");
}
}
} // namespace cru
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