35 lines
1.5 KiB
C
35 lines
1.5 KiB
C
#ifndef __ESP_EXPRESSION_WITH_STACK_H
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#define __ESP_EXPRESSION_WITH_STACK_H
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#include "freertos/FreeRTOS.h"
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#include "freertos/semphr.h"
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/**
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* @brief Executes a 1-line expression with a application alocated stack
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* @param lock Mutex object to protect in case of shared stack
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* @param stack Pointer to user alocated stack, it must points to its top
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* @param expression Expression or function to be executed using the stack
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*/
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#define EXECUTE_EXPRESSION_WITH_STACK(lock, stack, expression) \
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({ \
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if(lock) { \
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uint32_t backup; \
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xSemaphoreTake(lock, portMAX_DELAY); \
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switch_stack_enter(stack, &backup); \
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{ \
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expression; \
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} \
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switch_stack_exit(&backup); \
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xSemaphoreGive(lock); \
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} \
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})
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/**
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* These functions are intended to be use by the macro above, and
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* Should never be called directly, otherwise crashes could
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* occur
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*/
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extern void switch_stack_enter(portSTACK_TYPE *stack, uint32_t *backup_stack);
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extern void switch_stack_exit(uint32_t *backup_stack);
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#endif |