Release Cosmopolitan v3.6.0

This release is an atomic upgrade to GCC 14.1.0 with C23 and C++23

third_party/libcxx/mutex.cpp

@@ -0,0 +1,145 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include <__assert>
+#include <__thread/id.h>
+#include <__utility/exception_guard.h>
+#include <limits>
+#include <mutex>
+
+#include "atomic_support.h"
+
+#if defined(__ELF__) && defined(_LIBCPP_LINK_PTHREAD_LIB)
+#  pragma comment(lib, "pthread")
+#endif
+
+_LIBCPP_PUSH_MACROS
+#include <__undef_macros>
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+// ~mutex is defined elsewhere
+
+void mutex::lock() {
+  int ec = __libcpp_mutex_lock(&__m_);
+  if (ec)
+    __throw_system_error(ec, "mutex lock failed");
+}
+
+bool mutex::try_lock() noexcept { return __libcpp_mutex_trylock(&__m_); }
+
+void mutex::unlock() noexcept {
+  int ec = __libcpp_mutex_unlock(&__m_);
+  (void)ec;
+  _LIBCPP_ASSERT_VALID_EXTERNAL_API_CALL(
+      ec == 0, "call to mutex::unlock failed. A possible reason is that the mutex wasn't locked");
+}
+
+// recursive_mutex
+
+recursive_mutex::recursive_mutex() {
+  int ec = __libcpp_recursive_mutex_init(&__m_);
+  if (ec)
+    __throw_system_error(ec, "recursive_mutex constructor failed");
+}
+
+recursive_mutex::~recursive_mutex() {
+  int e = __libcpp_recursive_mutex_destroy(&__m_);
+  (void)e;
+  _LIBCPP_ASSERT_VALID_EXTERNAL_API_CALL(e == 0, "call to ~recursive_mutex() failed");
+}
+
+void recursive_mutex::lock() {
+  int ec = __libcpp_recursive_mutex_lock(&__m_);
+  if (ec)
+    __throw_system_error(ec, "recursive_mutex lock failed");
+}
+
+void recursive_mutex::unlock() noexcept {
+  int e = __libcpp_recursive_mutex_unlock(&__m_);
+  (void)e;
+  _LIBCPP_ASSERT_VALID_EXTERNAL_API_CALL(
+      e == 0, "call to recursive_mutex::unlock() failed. A possible reason is that the mutex wasn't locked");
+}
+
+bool recursive_mutex::try_lock() noexcept { return __libcpp_recursive_mutex_trylock(&__m_); }
+
+// timed_mutex
+
+timed_mutex::timed_mutex() : __locked_(false) {}
+
+timed_mutex::~timed_mutex() { lock_guard<mutex> _(__m_); }
+
+void timed_mutex::lock() {
+  unique_lock<mutex> lk(__m_);
+  while (__locked_)
+    __cv_.wait(lk);
+  __locked_ = true;
+}
+
+bool timed_mutex::try_lock() noexcept {
+  unique_lock<mutex> lk(__m_, try_to_lock);
+  if (lk.owns_lock() && !__locked_) {
+    __locked_ = true;
+    return true;
+  }
+  return false;
+}
+
+void timed_mutex::unlock() noexcept {
+  lock_guard<mutex> _(__m_);
+  __locked_ = false;
+  __cv_.notify_one();
+}
+
+// recursive_timed_mutex
+
+recursive_timed_mutex::recursive_timed_mutex() : __count_(0), __id_{} {}
+
+recursive_timed_mutex::~recursive_timed_mutex() { lock_guard<mutex> _(__m_); }
+
+void recursive_timed_mutex::lock() {
+  __thread_id id = this_thread::get_id();
+  unique_lock<mutex> lk(__m_);
+  if (id == __id_) {
+    if (__count_ == numeric_limits<size_t>::max())
+      __throw_system_error(EAGAIN, "recursive_timed_mutex lock limit reached");
+    ++__count_;
+    return;
+  }
+  while (__count_ != 0)
+    __cv_.wait(lk);
+  __count_ = 1;
+  __id_    = id;
+}
+
+bool recursive_timed_mutex::try_lock() noexcept {
+  __thread_id id = this_thread::get_id();
+  unique_lock<mutex> lk(__m_, try_to_lock);
+  if (lk.owns_lock() && (__count_ == 0 || id == __id_)) {
+    if (__count_ == numeric_limits<size_t>::max())
+      return false;
+    ++__count_;
+    __id_ = id;
+    return true;
+  }
+  return false;
+}
+
+void recursive_timed_mutex::unlock() noexcept {
+  unique_lock<mutex> lk(__m_);
+  if (--__count_ == 0) {
+    __id_.__reset();
+    lk.unlock();
+    __cv_.notify_one();
+  }
+}
+
+_LIBCPP_END_NAMESPACE_STD
+
+_LIBCPP_POP_MACROS