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MavlinkOrbSubscription: optimize fields for size

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reorder & reduce instance to uint8_t (which is more than enough).
Reduces sizeof(MavlinkOrbSubscription) from 40 to 24.

On Pixracer this frees almost 2KB of RAM
This commit is contained in:
Beat Küng
2016-10-18 15:31:37 +02:00
committed by Lorenz Meier
parent c50e4a6e21
commit 4da2ae2302
2 changed files with 5 additions and 5 deletions
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6
src/modules/mavlink/mavlink_orb_subscription.cpp
View File

@@ -50,11 +50,11 @@
MavlinkOrbSubscription::MavlinkOrbSubscription(const orb_id_t topic, int instance) :
next(nullptr),
_topic(topic),
_instance(instance),
_fd(-1),
_instance(instance),
_published(false),
_last_pub_check(0),
_subscribe_from_beginning(false)
_subscribe_from_beginning(false),
_last_pub_check(0)
{
}

4
src/modules/mavlink/mavlink_orb_subscription.h
View File

@@ -95,11 +95,11 @@ public:
private:
const orb_id_t _topic; ///< topic metadata
const int _instance; ///< get topic instance
int _fd; ///< subscription handle
const uint8_t _instance; ///< get topic instance
bool _published; ///< topic was ever published
hrt_abstime _last_pub_check; ///< when we checked last
bool _subscribe_from_beginning; ///< we need to subscribe from the beginning, e.g. for vehicle_command_acks
hrt_abstime _last_pub_check; ///< when we checked last
/* do not allow copying this class */
MavlinkOrbSubscription(const MavlinkOrbSubscription &);