[libc-commits] [libc] [llvm] [libc][CndVar] reimplmement conditional variable with FIFO ordering (PR #192748)

[Alexey Samsonov via libc-commits]

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@@ -6,49 +6,339 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_LIBC___SUPPORT_SRC_THREADS_LINUX_CNDVAR_H
-#define LLVM_LIBC___SUPPORT_SRC_THREADS_LINUX_CNDVAR_H
+#ifndef LLVM_LIBC_SRC___SUPPORT_THREADS_CNDVAR_H
+#define LLVM_LIBC_SRC___SUPPORT_THREADS_CNDVAR_H
 
 #include "hdr/stdint_proxy.h" // uint32_t
+#include "src/__support/CPP/limits.h"
+#include "src/__support/CPP/mutex.h"
+#include "src/__support/CPP/new.h"
 #include "src/__support/macros/config.h"
-#include "src/__support/threads/futex_utils.h"       // Futex
-#include "src/__support/threads/mutex.h"             // Mutex
-#include "src/__support/threads/raw_mutex.h"         // RawMutex
+#include "src/__support/threads/futex_utils.h" // Futex
+#include "src/__support/threads/mutex.h"       // Mutex
+#include "src/__support/threads/raw_mutex.h"   // RawMutex
+#include "src/__support/threads/sleep.h"
+
+#ifdef LIBC_COPT_TIMEOUT_ENSURE_MONOTONICITY
+#include "src/__support/time/monotonicity.h"
+#endif
 
 namespace LIBC_NAMESPACE_DECL {
 
+enum class CndVarResult {
+  Success,
+  MutexError,
+  Timeout,
+};
+
 class CndVar {
-  enum CndWaiterStatus : uint32_t {
-    WS_Waiting = 0xE,
-    WS_Signalled = 0x5,
+public:
+  using Timeout = internal::AbsTimeout;
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vonosmas wrote:

Add a dep on libc/src/__support/time/abs_timeout.h ?

https://github.com/llvm/llvm-project/pull/192748