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60 lines
1.5 KiB
60 lines
1.5 KiB
/* |
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* Copyright (C) 2024 Intel Corporation |
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* SPDX-License-Identifier: Apache-2.0 |
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*/ |
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#include <zephyr/kernel.h> |
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#include <kernel_internal.h> |
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/* We are not building thread.c when MULTITHREADING=n, so we |
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* need to provide a few stubs here. |
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*/ |
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bool k_is_in_isr(void) |
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{ |
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return arch_is_in_isr(); |
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} |
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/* This is a fallback implementation of k_sleep() for when multi-threading is |
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* disabled. The main implementation is in sched.c. |
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*/ |
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int32_t z_impl_k_sleep(k_timeout_t timeout) |
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{ |
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k_ticks_t ticks; |
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uint32_t ticks_to_wait; |
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__ASSERT(!arch_is_in_isr(), ""); |
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SYS_PORT_TRACING_FUNC_ENTER(k_thread, sleep, timeout); |
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/* in case of K_FOREVER, we suspend */ |
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if (K_TIMEOUT_EQ(timeout, K_FOREVER)) { |
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/* In Single Thread, just wait for an interrupt saving power */ |
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k_cpu_idle(); |
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SYS_PORT_TRACING_FUNC_EXIT(k_thread, sleep, timeout, (int32_t) K_TICKS_FOREVER); |
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return (int32_t) K_TICKS_FOREVER; |
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} |
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ticks = timeout.ticks; |
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if (Z_IS_TIMEOUT_RELATIVE(timeout)) { |
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/* ticks is delta timeout */ |
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ticks_to_wait = ticks; |
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} else { |
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/* ticks is absolute timeout expiration */ |
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uint32_t curr_ticks = sys_clock_tick_get_32(); |
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if (Z_TICK_ABS(ticks) > curr_ticks) { |
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ticks_to_wait = Z_TICK_ABS(ticks) - curr_ticks; |
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} else { |
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ticks_to_wait = 0; |
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} |
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} |
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/* busy wait to be time coherent since subsystems may depend on it */ |
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z_impl_k_busy_wait(k_ticks_to_us_ceil32(ticks_to_wait)); |
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int32_t ret = k_ticks_to_ms_ceil64(0); |
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SYS_PORT_TRACING_FUNC_EXIT(k_thread, sleep, timeout, ret); |
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return ret; |
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}
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