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net: lib: mqtt: Enable blocking PUBLISH payload readout

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It is convenient to have a blocking version of
`mqtt_read_publish_payload` function, for cases when it is called from
the event handler. Therefore, extend the 'mqtt_read_publish_payload'
argument list with information whether the call should block or not.

Signed-off-by: Robert Lubos <robert.lubos@nordicsemi.no>
This commit is contained in:
Robert Lubos 2019-02-05 12:52:40 +01:00 • committed by Anas Nashif
commit b8494d9a51
8 changed files with 61 additions and 17 deletions
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14
include/net/mqtt.h
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@ -698,6 +698,20 @@ int mqtt_input(struct mqtt_client *client);
int mqtt_read_publish_payload(struct mqtt_client *client, void *buffer,
size_t length);
/**
* @brief Blocking version of @ref mqtt_read_publish_payload function.
*
* @param[in] client Client instance for which the procedure is requested.
* Shall not be NULL.
* @param[out] buffer Buffer where payload should be stored.
* @param[in] length Length of the buffer, in bytes.
*
* @return Number of bytes read or a negative error code (errno.h) indicating
* reason of failure.
*/
int mqtt_read_publish_payload_blocking(struct mqtt_client *client, void *buffer,
size_t length);
#ifdef __cplusplus
}
#endif