example4_logging.c

/**
 * Example 4: File Logging
 * 
 * Demonstrates automatic logging to files
 */

#include "profiler.h"
#include <unistd.h>

void simulate_work(int ms) {
    usleep(ms * 1000);
}

void logged_function(void) {
    PROFILER_FUNCTION();
    simulate_work(15);
}

int main(void) {
    profiler_init();
    
    printf("=== Example 4: File Logging ===\n\n");
    
    /* Enable file logging */
    profiler_set_log_file("profiler.log");
    
    printf("Logging to profiler.log...\n");
    
    /* These will be automatically logged */
    {
        PROFILER_SCOPE(operation_1);
        simulate_work(10);
    }
    
    {
        PROFILER_SCOPE(operation_2);
        simulate_work(20);
    }
    
    logged_function();
    
    /* Manual timer with logging */
    profiler_timer_t timer;
    profiler_timer_start(&timer, "manual_logged");
    simulate_work(30);
    profiler_timer_stop(&timer);
    
    /* Also log statistics to file */
    profiler_stats_t stats;
    profiler_stats_init(&stats, "batch_operations");
    for (int i = 0; i < 5; i++) {
        profiler_timer_t t;
        profiler_timer_start(&t, "batch_op");
        simulate_work(8 + i * 2);
        profiler_timer_stop(&t);
        profiler_stats_add(&stats, profiler_timer_elapsed_ns(&t));
    }
    
    FILE *log = fopen("profiler.log", "a");
    if (log) {
        profiler_stats_log(&stats, log);
        fclose(log);
    }
    
    printf("Results logged to profiler.log\n");
    
    profiler_shutdown();
    return 0;
}