timer.h

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#ifndef NROS_TIMER_H
#define NROS_TIMER_H
 
/* Type and function definitions live in <rclc/detail/nros_generated.h>.
 * This per-module header is kept as a thin shim so existing code that
 * does `#include <rclc/timer.h>` continues to compile. */
#include "rclc/types.h"
 
#include <stddef.h>

#define RCLC_CONTAINER_OF(ptr, type, member) ((type*)(void*)((char*)(ptr)-offsetof(type, member)))

static inline rcl_ret_t rcl_difference_times(const struct rclc_time_t* start,
                                             const struct rclc_time_t* finish,
                                             struct rcl_duration_t* delta) {
    if (start == NULL || finish == NULL || delta == NULL) {
        return RCL_RET_INVALID_ARGUMENT;
    }
    /* Both decodes go through the exported entry point; see the note above on
     * why neither the decode nor the encode is spelled out here. */
    *delta = rclc_duration_from_nanoseconds(rclc_time_to_nanoseconds(finish) -
                                            rclc_time_to_nanoseconds(start));
    return RCL_RET_OK;
}
 
#endif /* NROS_TIMER_H */
 
/* Every upstream-path header carries the whole C API, as `<rclc/rclc.h>` does
 * (phase-492): a ported file that includes only `<rclc/timer.h>` still finds
 * `RCLC_CHECK_RET`, `RCLC_LOG_*` and the rcl spellings. Outside the guard, so
 * this header's own declarations are complete before the umbrella reads them. */
#include "rclc/rclc.h"