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Logging: avoid blocking in timer context

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This commit is contained in:
Michael Balzer 2020-06-13 14:22:21 +02:00
parent 4195d7c2ee
commit 9024cd38ec
2 changed files with 19 additions and 5 deletions
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1
components/freertos/include/freertos/FreeRTOSConfig.h
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@ -289,6 +289,7 @@ extern void vPortCleanUpTCB ( void *pxTCB );
#define configTIMER_TASK_STACK_DEPTH CONFIG_TIMER_TASK_STACK_DEPTH
#define INCLUDE_xTimerPendFunctionCall 1
#define INCLUDE_xTimerGetTimerDaemonTaskHandle 1
#define INCLUDE_eTaskGetState 1
#define configUSE_QUEUE_SETS 1

13
components/log/log.c
View file

@ -40,6 +40,7 @@
#include <freertos/FreeRTOS.h>
#include <freertos/FreeRTOSConfig.h>
#include <freertos/task.h>
#include <freertos/timers.h>
#include <freertos/semphr.h>
#endif
@ -191,6 +192,18 @@ void IRAM_ATTR esp_log_write(esp_log_level_t level,
if (!s_log_mutex) {
s_log_mutex = xSemaphoreCreateMutex();
}
#if ( configUSE_TIMERS == 1 ) && ( INCLUDE_xTimerGetTimerDaemonTaskHandle == 0 )
#warning "Logging from timer context may block, consider enabling INCLUDE_xTimerGetTimerDaemonTaskHandle"
#elif ( configUSE_TIMERS == 1 ) && ( INCLUDE_xTimerGetTimerDaemonTaskHandle == 1 )
// Avoid blocking in timer context:
if (xTaskGetSchedulerState() != taskSCHEDULER_RUNNING
|| xTaskGetCurrentTaskHandle() == xTimerGetTimerDaemonTaskHandle()) {
if (xSemaphoreTake(s_log_mutex, 0) == pdFALSE) {
return;
}
}
else
#endif
if (xSemaphoreTake(s_log_mutex, MAX_MUTEX_WAIT_TICKS) == pdFALSE) {
return;
}