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config: option to configure output buffer size

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Both input and output buffers had the same size, but it is desirable in embedded environment to use asymetric buffers. Added configuration option to defined output buffer size, if not defined output buffer defaults to the same size as the input buffer.

Closes https://github.com/espressif/esp-mqtt/issues/152
This commit is contained in:
David Cermak
2020-03-10 15:26:49 +01:00
parent 8a1e1a5a9f
commit f243225521
2 changed files with 6 additions and 3 deletions
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6
mqtt_client.c
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@@ -654,14 +654,16 @@ esp_mqtt_client_handle_t esp_mqtt_client_init(const esp_mqtt_client_config_t *co
if (buffer_size <= 0) {
buffer_size = MQTT_BUFFER_SIZE_BYTE;
}
// use separate value for output buffer size if configured
int out_buffer_size = config->out_buffer_size > 0 ? config->out_buffer_size : buffer_size;
client->mqtt_state.in_buffer = (uint8_t *)malloc(buffer_size);
ESP_MEM_CHECK(TAG, client->mqtt_state.in_buffer, goto _mqtt_init_failed);
client->mqtt_state.in_buffer_length = buffer_size;
client->mqtt_state.out_buffer = (uint8_t *)malloc(buffer_size);
client->mqtt_state.out_buffer = (uint8_t *)malloc(out_buffer_size);
ESP_MEM_CHECK(TAG, client->mqtt_state.out_buffer, goto _mqtt_init_failed);
client->mqtt_state.out_buffer_length = buffer_size;
client->mqtt_state.out_buffer_length = out_buffer_size;
client->mqtt_state.connect_info = &client->connect_info;
client->outbox = outbox_init();
ESP_MEM_CHECK(TAG, client->outbox, goto _mqtt_init_failed);