Native plugin for os_signposts

signposts.mm

#import <os/signpost.h>

// We need to specify a subsystem
#define SUBSYSTEM "de.apptects.signposts"

// Categories helps us structuring the data in Instruments
#define CATEGORY_ASSETLOADING "Asset Loading"
#define CATEGORY_INPUT "Input"

// Interval names
#define INTERVAL_LOAD_ASSET "Load Asset"

// Event names
#define EVENT_INPUT_TAP "Tap"

// Store values for log-handles
static os_log_t s_logHandleAssetLoading;
static os_log_t s_logHandlePointsOfInterest;

extern "C"
{
    // Initialize log-handles at the beginning
    void initialize_log_handles()
    {
        s_logHandleAssetLoading = os_log_create(SUBSYSTEM, CATEGORY_ASSETLOADING);
        s_logHandlePointsOfInterest = os_log_create(SUBSYSTEM, OS_LOG_CATEGORY_POINTS_OF_INTEREST);
    }

    // Start load asset interval with asset path as metadata and return unique signpost-id
    unsigned long long start_interval_load_asset(const char* _assetPath)
    {
        unsigned long long signpostId = os_signpost_id_generate(s_logHandleAssetLoading);
        os_signpost_interval_begin(s_logHandleAssetLoading, signpostId, INTERVAL_LOAD_ASSET, "Asset Path: %{public}s", _assetPath);
        return signpostId;
    }

    // Stop load asset interval with its unique signpost-id
    void stop_interval_load_asset(unsigned long long _signpostId)
    {
        os_signpost_interval_end(s_logHandleAssetLoading, _signpostId, INTERVAL_LOAD_ASSET);
    }

    // Stop load asset interval with its unique signpost-id and custom metadata ("Failed")
    void stop_interval_load_asset_failed(unsigned long long _signpostId)
    {
        os_signpost_interval_end(s_logHandleAssetLoading, _signpostId, INTERVAL_LOAD_ASSET, "Failed");
    }

    // Trigger signpost event for tap event, passing x/y coordinates as metadata
    void event_input_tap(int _x, int _y)
    {
        unsigned long long sid = os_signpost_id_generate(s_logHandlePointsOfInterest);
        os_signpost_event_emit(s_logHandlePointsOfInterest, sid, EVENT_INPUT_TAP, "x: %d, y: %d", _x, _y);
    }
}