From 8bdb5db67fa3eeda755511f91fd257bde548a18f Mon Sep 17 00:00:00 2001
From: crupest <crupest@outlook.com>
Date: Wed, 9 Jun 2021 22:28:01 +0800
Subject: import(life): ...

---
 works/life/operating-system-experiment/Base.h      |  4 --
 .../operating-system-experiment/CMakeLists.txt     |  4 ++
 works/life/operating-system-experiment/Thread.cpp  | 53 ++++++++++++++++++++--
 works/life/operating-system-experiment/Thread.h    | 17 +++++++
 4 files changed, 69 insertions(+), 9 deletions(-)

diff --git a/works/life/operating-system-experiment/Base.h b/works/life/operating-system-experiment/Base.h
index b3ac1ee..6964c1c 100644
--- a/works/life/operating-system-experiment/Base.h
+++ b/works/life/operating-system-experiment/Base.h
@@ -5,10 +5,6 @@
 #define CRU_WINDOWS 1
 #endif
 
-#ifdef CRU_WINDOWS
-#include <Windows.h>
-#endif
-
 #ifdef CRU_WINDOWS
 #ifdef CRU_EXPORT_API
 #define CRU_API __declspec(dllexport)
diff --git a/works/life/operating-system-experiment/CMakeLists.txt b/works/life/operating-system-experiment/CMakeLists.txt
index 2c46b0f..540574b 100644
--- a/works/life/operating-system-experiment/CMakeLists.txt
+++ b/works/life/operating-system-experiment/CMakeLists.txt
@@ -12,6 +12,10 @@ find_package(Microsoft.GSL CONFIG REQUIRED)
 add_library(cru_system SHARED Thread.cpp)
 target_link_libraries(cru_system PUBLIC Microsoft.GSL::GSL fmt::fmt)
 target_compile_definitions(cru_system PUBLIC CRU_EXPORT_API)
+if(UNIX)
+target_link_libraries(cru_system PUBLIC pthread)
+endif()
+
 
 add_executable(main main.cpp)
 target_link_libraries(main PRIVATE cru_system)
\ No newline at end of file
diff --git a/works/life/operating-system-experiment/Thread.cpp b/works/life/operating-system-experiment/Thread.cpp
index b91ca69..8230c1c 100644
--- a/works/life/operating-system-experiment/Thread.cpp
+++ b/works/life/operating-system-experiment/Thread.cpp
@@ -2,21 +2,36 @@
 
 #include <cassert>
 #include <exception>
+#include <pthread.h>
 #include <utility>
 
 namespace cru {
 Thread::Thread(Thread &&other) noexcept
-    : joined_(other.joined_), thread_handle_(other.thread_handle_) {
+    : detached_(other.detached_), joined_(other.joined_),
+#ifdef CRU_WINDOWS
+      thread_handle_(other.thread_handle_)
+#else
+      thread_(std::move(other.thread_))
+#endif
+{
   other.joined_ = false;
+#ifdef CRU_WINDOWS
   other.thread_handle_ = nullptr;
-}
+#endif
+} // namespace cru
 
 Thread &Thread::operator=(Thread &&other) noexcept {
   if (this != &other) {
+    detached_ = other.detached_;
     joined_ = other.joined_;
+#ifdef CRU_WINDOWS
     thread_handle_ = other.thread_handle_;
-    other.joined_ = false;
     other.thread_handle_ = nullptr;
+#else
+    thread_ = std::move(other.thread_);
+#endif
+    other.detached_ = false;
+    other.joined_ = false;
   }
 
   return *this;
@@ -25,13 +40,23 @@ Thread &Thread::operator=(Thread &&other) noexcept {
 Thread::~Thread() { Destroy(); }
 
 void Thread::Join() {
-  assert(thread_handle_);
   joined_ = true;
+#ifdef CRU_WINDOWS
+  assert(thread_handle_);
   WaitForSingleObject(thread_handle_, INFINITE);
+#else
+  assert(thread_);
+  auto c = pthread_join(*thread_, nullptr);
+  assert(c == 0);
+#endif
 }
 
 void Thread::Detach() {
+#ifdef CRU_WINDOWS
   assert(thread_handle_);
+#else
+  assert(thread_);
+#endif
   detached_ = true;
 }
 
@@ -45,11 +70,22 @@ void Thread::swap(Thread &other) noexcept {
 }
 
 void Thread::Destroy() noexcept {
-  if (!detached_ && !joined_ && thread_handle_ != nullptr) {
+  if (!detached_ && !joined_ &&
+#ifdef CRU_WINDOWS
+      thread_handle_ != nullptr
+#else
+      thread_ != nullptr
+#endif
+  ) {
     std::terminate();
   } else {
+    detached_ = false;
     joined_ = false;
+#ifdef CRU_WINDOWS
     thread_handle_ = nullptr;
+#else
+    thread_ = nullptr;
+#endif
   }
 }
 
@@ -62,6 +98,13 @@ DWORD WINAPI ThreadProc(_In_ LPVOID lpParameter) {
   return 0;
 }
 #else
+void *ThreadProc(void *data) {
+  auto p = static_cast<std::function<void()> *>(data);
+  (*p)();
+  delete p;
+  return nullptr;
+}
+
 #endif
 } // namespace details
 } // namespace cru
\ No newline at end of file
diff --git a/works/life/operating-system-experiment/Thread.h b/works/life/operating-system-experiment/Thread.h
index c71c11f..79c1728 100644
--- a/works/life/operating-system-experiment/Thread.h
+++ b/works/life/operating-system-experiment/Thread.h
@@ -3,9 +3,17 @@
 
 #include "Base.h"
 
+#ifdef CRU_WINDOWS
+#include <Windows.h>
+#else
+#include <pthread.h>
+#endif
+
 #ifdef __cplusplus
 
+#include <cassert>
 #include <functional>
+#include <memory>
 #include <tuple>
 #include <type_traits>
 #include <utility>
@@ -38,6 +46,8 @@ private:
 #ifdef CRU_WINDOWS
   DWORD thread_id_ = 0;
   HANDLE thread_handle_ = nullptr;
+#else
+  std::unique_ptr<pthread_t> thread_;
 #endif
 };
 
@@ -45,6 +55,7 @@ namespace details {
 #ifdef CRU_WINDOWS
 CRU_API DWORD WINAPI ThreadProc(_In_ LPVOID lpParameter);
 #else
+void *ThreadProc(void *data);
 #endif
 } // namespace details
 
@@ -59,6 +70,12 @@ Thread::Thread(Fn &&process, Args &&...args) {
 #ifdef CRU_WINDOWS
   thread_handle_ = ::CreateThread(nullptr, 0, &::cru::details::ThreadProc,
                                   static_cast<void *>(p), 0, &thread_id_);
+  assert(thread_handle_);
+#else
+  thread_.reset(new pthread_t());
+  auto c = pthread_create(thread_.get(), nullptr, details::ThreadProc,
+                          static_cast<void *>(p));
+  assert(c == 0);
 #endif
 };
 } // namespace cru
-- 
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