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sysparam: add a semaphore to synchronize writers. (#194)

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Our Air Quality 2016-08-21 15:47:40 +10:00 committed by Johan Kanflo
parent 95081a1e9f
commit 762eced543
1 changed files with 17 additions and 2 deletions
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19
core/sysparam.c
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@ -10,6 +10,8 @@
#include <sysparam.h>
#include <espressif/spi_flash.h>
#include <common_macros.h>
#include "FreeRTOS.h"
#include "semphr.h"
//TODO: make this properly threadsafe
//TODO: reduce stack usage
@ -112,6 +114,7 @@ static struct {
uint32_t end_addr;
size_t region_size;
bool force_compact;
xSemaphoreHandle sem;
} _sysparam_info;
/***************************** Internal routines *****************************/
@ -571,6 +574,8 @@ sysparam_status_t sysparam_init(uint32_t base_addr, uint32_t top_addr) {
_sysparam_info.end_addr = ctx.addr;
}
_sysparam_info.sem = xSemaphoreCreateMutex();
return SYSPARAM_OK;
}
@ -788,6 +793,8 @@ sysparam_status_t sysparam_set_data(const char *key, const uint8_t *value, size_
if (key_len > MAX_KEY_LEN) return SYSPARAM_ERR_BADVALUE;
if (value_len > MAX_VALUE_LEN) return SYSPARAM_ERR_BADVALUE;
xSemaphoreTake(_sysparam_info.sem, portMAX_DELAY);
if (!value) value_len = 0;
debug(1, "updating value for '%s' (%d bytes)", key, value_len);
@ -795,7 +802,10 @@ sysparam_status_t sysparam_set_data(const char *key, const uint8_t *value, size_
// The passed value isn't word-aligned. This will be a problem later
// when calling `sdk_spi_flash_write`, so make a word-aligned copy.
buffer = malloc(value_len);
if (!buffer) return SYSPARAM_ERR_NOMEM;
if (!buffer) {
status = SYSPARAM_ERR_NOMEM;
goto done;
}
memcpy(buffer, value, value_len);
value = buffer;
free_value = true;
@ -804,7 +814,8 @@ sysparam_status_t sysparam_set_data(const char *key, const uint8_t *value, size_
buffer = malloc(key_len);
if (!buffer) {
if (free_value) free((void *)value);
return SYSPARAM_ERR_NOMEM;
status = SYSPARAM_ERR_NOMEM;
goto done;
}
do {
@ -945,6 +956,10 @@ sysparam_status_t sysparam_set_data(const char *key, const uint8_t *value, size_
if (free_value) free((void *)value);
free(buffer);
done:
xSemaphoreGive(_sysparam_info.sem);
return status;
}