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54 lines
1.8 KiB
54 lines
1.8 KiB
// Copyright 2020 The Pigweed Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not
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// use this file except in compliance with the License. You may obtain a copy of
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// the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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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, WITHOUT
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// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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// License for the specific language governing permissions and limitations under
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// the License.
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#include "pw_thread/sleep.h"
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#include <algorithm>
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#include "pw_assert/assert.h"
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#include "pw_chrono/system_clock.h"
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#include "pw_chrono_threadx/system_clock_constants.h"
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#include "pw_thread/id.h"
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#include "tx_api.h"
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using pw::chrono::SystemClock;
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namespace pw::this_thread {
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void sleep_for(chrono::SystemClock::duration for_at_least) {
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PW_DCHECK(get_id() != thread::Id());
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// Yield for negative and zero length durations.
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if (for_at_least <= chrono::SystemClock::duration::zero()) {
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tx_thread_relinquish();
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return;
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}
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// On a tick based kernel we cannot tell how far along we are on the current
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// tick, ergo we add one whole tick to the final duration.
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constexpr SystemClock::duration kMaxTimeoutMinusOne =
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pw::chrono::threadx::kMaxTimeout - SystemClock::duration(1);
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while (for_at_least > kMaxTimeoutMinusOne) {
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const UINT result =
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tx_thread_sleep(static_cast<ULONG>(kMaxTimeoutMinusOne.count()));
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PW_CHECK_UINT_EQ(TX_SUCCESS, result);
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for_at_least -= kMaxTimeoutMinusOne;
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}
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const UINT result =
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tx_thread_sleep(static_cast<ULONG>(for_at_least.count() + 1));
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PW_CHECK_UINT_EQ(TX_SUCCESS, result);
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}
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} // namespace pw::this_thread
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