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40 lines
1.5 KiB
C
40 lines
1.5 KiB
C
// clang-format off
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/* Copyright 2016 Google Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License. */
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#ifndef NSYNC_INTERNAL_WAIT_INTERNAL_H_
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#define NSYNC_INTERNAL_WAIT_INTERNAL_H_
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#include "libc/thread/dll.h"
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#include "libc/thread/nsync_atomic.h"
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#include "libc/thread/nsync_cpp.h"
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NSYNC_CPP_START_
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/* Implementations of "struct nsync_waitable_s" must provide functions in struct
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nsync_waitable_funcs_s (see public/nsync_wait.h). When nsync_wait_n() waits
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on a client's object, those functions are called with v pointing to the
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client's object and nw pointing to a struct nsync_waiter_s. */
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struct nsync_waiter_s {
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uint32_t tag; /* used for debugging */
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nsync_dll_element_ q; /* used to link children of parent */
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nsync_atomic_uint32_ waiting; /* non-zero <=> the waiter is waiting */
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struct nsync_semaphore_s_ *sem; /* *sem will be Ved when waiter is woken */
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uint32_t flags; /* see below */
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};
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#define NSYNC_WAITER_FLAG_MUCV 0x1 /* set if waiter is embedded in Mu/CV's internal structures */
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NSYNC_CPP_END_
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#endif /*NSYNC_INTERNAL_WAIT_INTERNAL_H_*/
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