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75 lines
1.3 KiB
75 lines
1.3 KiB
/* |
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* Copyright (c) 2020 Intel Corporation. |
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* |
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* SPDX-License-Identifier: Apache-2.0 |
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*/ |
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#include <stdbool.h> |
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#include <zephyr/kernel.h> |
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#include <zephyr/sys/atomic.h> |
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#include <zephyr/timing/timing.h> |
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static bool has_inited; |
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static atomic_val_t started_ref; |
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void timing_init(void) |
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{ |
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if (has_inited) { |
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return; |
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} |
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#if defined(CONFIG_BOARD_HAS_TIMING_FUNCTIONS) |
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board_timing_init(); |
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#elif defined(CONFIG_SOC_HAS_TIMING_FUNCTIONS) |
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soc_timing_init(); |
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#else |
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arch_timing_init(); |
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#endif |
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has_inited = true; |
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} |
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void timing_start(void) |
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{ |
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if (atomic_inc(&started_ref) != 0) { |
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return; |
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} |
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#if defined(CONFIG_BOARD_HAS_TIMING_FUNCTIONS) |
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board_timing_start(); |
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#elif defined(CONFIG_SOC_HAS_TIMING_FUNCTIONS) |
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soc_timing_start(); |
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#else |
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arch_timing_start(); |
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#endif |
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} |
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void timing_stop(void) |
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{ |
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atomic_t old_value, new_value; |
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/* Make sure this does decrement past zero. */ |
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do { |
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old_value = atomic_get(&started_ref); |
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if (old_value <= 0) { |
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break; |
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} |
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new_value = old_value - 1; |
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} while (atomic_cas(&started_ref, old_value, new_value) == 0); |
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/* |
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* new_value may be uninitialized, so use old_value here. |
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*/ |
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if (old_value > 1) { |
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return; |
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} |
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#if defined(CONFIG_BOARD_HAS_TIMING_FUNCTIONS) |
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board_timing_stop(); |
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#elif defined(CONFIG_SOC_HAS_TIMING_FUNCTIONS) |
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soc_timing_stop(); |
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#else |
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arch_timing_stop(); |
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#endif |
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}
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