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0c47c45303
This commit adds required conditional compilation blocks to enable bulding on FreeBSD (tested on x86_64 FreeBSD 14.1-RELEASE-p6). Also implements FreeBSD synchronization shims using `_umtx_op(2)`
75 lines
1.8 KiB
C
75 lines
1.8 KiB
C
//===----------------------------------------------------------------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2024 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_STDLIB_SYNCHRONIZATION_SHIMS_H
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#define SWIFT_STDLIB_SYNCHRONIZATION_SHIMS_H
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#include "SwiftStdbool.h"
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#include "SwiftStdint.h"
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#if defined(__linux__)
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#include <errno.h>
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#include <linux/futex.h>
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#include <sys/syscall.h>
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#include <unistd.h>
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static inline __swift_uint32_t _swift_stdlib_gettid() {
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static __thread __swift_uint32_t tid = 0;
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if (tid == 0) {
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tid = syscall(SYS_gettid);
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}
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return tid;
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}
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static inline __swift_uint32_t _swift_stdlib_futex_lock(__swift_uint32_t *lock) {
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int ret = syscall(SYS_futex, lock, FUTEX_LOCK_PI_PRIVATE,
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/* val */ 0, // this value is ignored by this futex op
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/* timeout */ NULL); // block indefinitely
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if (ret == 0) {
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return ret;
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}
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return errno;
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}
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static inline __swift_uint32_t _swift_stdlib_futex_trylock(__swift_uint32_t *lock) {
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int ret = syscall(SYS_futex, lock, FUTEX_TRYLOCK_PI);
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if (ret == 0) {
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return ret;
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}
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return errno;
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}
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static inline __swift_uint32_t _swift_stdlib_futex_unlock(__swift_uint32_t *lock) {
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int ret = syscall(SYS_futex, lock, FUTEX_UNLOCK_PI_PRIVATE);
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if (ret == 0) {
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return ret;
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}
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return errno;
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}
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#endif // defined(__linux__)
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#if defined(__FreeBSD__)
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#include <sys/types.h>
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#include <sys/umtx.h>
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#endif
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#endif // SWIFT_STDLIB_SYNCHRONIZATION_SHIMS_H
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