From 545a638929218a83d194402b3d52f5bffd87d9eb Mon Sep 17 00:00:00 2001
From: Yuqian Yang <crupest@crupest.life>
Date: Tue, 2 Sep 2025 22:29:11 +0800
Subject: UnixFileDescriptor.

---
 include/cru/base/platform/unix/UnixFile.h | 61 +++++++++++++++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 include/cru/base/platform/unix/UnixFile.h

(limited to 'include/cru/base/platform/unix/UnixFile.h')

diff --git a/include/cru/base/platform/unix/UnixFile.h b/include/cru/base/platform/unix/UnixFile.h
new file mode 100644
index 00000000..63545428
--- /dev/null
+++ b/include/cru/base/platform/unix/UnixFile.h
@@ -0,0 +1,61 @@
+#pragma once
+
+#if !defined(__unix)
+#error "This file can only be included on unix."
+#endif
+
+#include "../../Bitmask.h"
+
+#include <functional>
+
+namespace cru::platform::unix {
+class UnixFileDescriptor {
+ public:
+  UnixFileDescriptor();
+  /**
+   * \param close Default to POSIX close function.
+   */
+  explicit UnixFileDescriptor(int descriptor, bool auto_close = true,
+                              std::function<int(int)> close = {});
+  ~UnixFileDescriptor();
+
+  UnixFileDescriptor(const UnixFileDescriptor& other) = delete;
+  UnixFileDescriptor& operator=(const UnixFileDescriptor& other) = delete;
+
+  UnixFileDescriptor(UnixFileDescriptor&& other) noexcept;
+  UnixFileDescriptor& operator=(UnixFileDescriptor&& other) noexcept;
+
+  bool IsValid() const;
+  int GetValue() const;
+  void Close();
+
+  bool IsAutoClose() const { return auto_close_; }
+  void SetAutoClose(bool auto_close) { this->auto_close_ = auto_close; }
+
+  explicit operator bool() const { return this->IsValid(); }
+  operator int() const { return this->GetValue(); }
+
+ private:
+  bool DoClose();
+
+ private:
+  int descriptor_;
+  bool auto_close_;
+  std::function<int(int)> close_;
+};
+
+struct UniDirectionalUnixPipeResult {
+  UnixFileDescriptor read;
+  UnixFileDescriptor write;
+};
+
+namespace details {
+struct UnixPipeFlagTag;
+}
+using UnixPipeFlag = Bitmask<details::UnixPipeFlagTag>;
+struct UnixPipeFlags {
+  constexpr static auto NonBlock = UnixPipeFlag::FromOffset(1);
+};
+
+UniDirectionalUnixPipeResult OpenUniDirectionalPipe(UnixPipeFlag flags = {});
+}  // namespace cru::platform::unix
-- 
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