mirror of
https://github.com/apple/swift.git
synced 2025-12-14 20:36:38 +01:00
ef8825bfe6
LLVM has removed llvm::Optional, move over to std::optional. Also clang-format to fix up all the renamed #includes.
105 lines
3.3 KiB
C++
105 lines
3.3 KiB
C++
//==--- Nothreads.h - Threading abstraction implementation ----- -*-C++ -*-===//
|
|
//
|
|
// This source file is part of the Swift.org open source project
|
|
//
|
|
// Copyright (c) 2022 Apple Inc. and the Swift project authors
|
|
// Licensed under Apache License v2.0 with Runtime Library Exception
|
|
//
|
|
// See https://swift.org/LICENSE.txt for license information
|
|
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Implements threading support for platforms without threading
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef SWIFT_THREADING_IMPL_NOTHREADS_H
|
|
#define SWIFT_THREADING_IMPL_NOTHREADS_H
|
|
|
|
#include <optional>
|
|
|
|
#include "chrono_utils.h"
|
|
|
|
namespace swift {
|
|
namespace threading_impl {
|
|
|
|
// .. Thread related things ..................................................
|
|
|
|
using thread_id = unsigned;
|
|
|
|
inline thread_id thread_get_current() { return 0; }
|
|
inline bool thread_is_main() { return true; }
|
|
inline bool threads_same(thread_id a, thread_id b) { return a == b; }
|
|
inline std::optional<stack_bounds> thread_get_current_stack_bounds() {
|
|
return {};
|
|
}
|
|
|
|
// .. Mutex support ..........................................................
|
|
|
|
using mutex_handle = unsigned;
|
|
|
|
inline void mutex_init(mutex_handle &handle, bool checked = false) {}
|
|
inline void mutex_destroy(mutex_handle &handle) {}
|
|
inline void mutex_lock(mutex_handle &handle) {}
|
|
inline void mutex_unlock(mutex_handle &handle) {}
|
|
inline bool mutex_try_lock(mutex_handle &handle) { return true; }
|
|
|
|
inline void mutex_unsafe_lock(mutex_handle &handle) {}
|
|
inline void mutex_unsafe_unlock(mutex_handle &handle) {}
|
|
|
|
using lazy_mutex_handle = unsigned;
|
|
|
|
#define SWIFT_LAZY_MUTEX_INITIALIZER 0
|
|
|
|
inline void lazy_mutex_destroy(lazy_mutex_handle &handle) {}
|
|
inline void lazy_mutex_lock(lazy_mutex_handle &handle) {}
|
|
inline void lazy_mutex_unlock(lazy_mutex_handle &handle) {}
|
|
inline bool lazy_mutex_try_lock(lazy_mutex_handle &handle) { return true; }
|
|
|
|
inline void lazy_mutex_unsafe_lock(lazy_mutex_handle &handle) {}
|
|
inline void lazy_mutex_unsafe_unlock(lazy_mutex_handle &handle) {}
|
|
|
|
// .. ConditionVariable support ..............................................
|
|
|
|
using cond_handle = unsigned;
|
|
|
|
inline void cond_init(cond_handle &handle) {}
|
|
inline void cond_destroy(cond_handle &handle) {}
|
|
inline void cond_lock(cond_handle &handle) {}
|
|
inline void cond_unlock(cond_handle &handle) {}
|
|
inline void cond_signal(cond_handle &handle) {}
|
|
inline void cond_broadcast(cond_handle &handle) {}
|
|
inline void cond_wait(cond_handle &handle) {}
|
|
template <class Rep, class Period>
|
|
inline bool cond_wait(cond_handle &handle,
|
|
std::chrono::duration<Rep, Period> duration) {
|
|
return true;
|
|
}
|
|
inline bool cond_wait(cond_handle &handle,
|
|
std::chrono::system_clock::time_point deadline) {
|
|
return true;
|
|
}
|
|
|
|
// .. Once ...................................................................
|
|
|
|
typedef bool once_t;
|
|
|
|
inline void once_impl(once_t &predicate, void (*fn)(void *), void *ctx) {
|
|
if (!predicate) {
|
|
predicate = true;
|
|
fn(ctx);
|
|
}
|
|
}
|
|
|
|
// .. Thread local storage ...................................................
|
|
|
|
// If we have no threads, we can use the simple version of TLS
|
|
#define SWIFT_THREAD_LOCAL
|
|
|
|
} // namespace threading_impl
|
|
|
|
} // namespace swift
|
|
|
|
#endif // SWIFT_THREADING_IMPL_NOTHREADS_H
|