Rava/runtime/fastframe.c

#include "fastframe.h"
#include <string.h>

FastFrame_t rava_frame_pool[RAVA_MAX_CALL_DEPTH];
size_t rava_frame_depth = 0;

void rava_fastframe_init(void) {
    rava_frame_depth = 0;
    memset(rava_frame_pool, 0, sizeof(rava_frame_pool));
}

FastFrame_t* rava_fastframe_push(RavaMethod_t* method, int local_count) {
    if (rava_frame_depth >= RAVA_MAX_CALL_DEPTH) {
        return NULL;
    }

    FastFrame_t* frame = &rava_frame_pool[rava_frame_depth++];
    frame->method = method;
    frame->stack_top = 0;
    frame->pc = 0;
    frame->has_this = false;
    frame->this_ref = rava_nanbox_null();

    if (local_count > 0 && local_count <= RAVA_MAX_LOCALS_FIXED) {
        memset(frame->locals, 0, (size_t)local_count * sizeof(RavaNanboxValue_t));
    }

    return frame;
}

void rava_fastframe_pop(void) {
    if (rava_frame_depth > 0) {
        rava_frame_depth--;
    }
}

FastFrame_t* rava_fastframe_current(void) {
    if (rava_frame_depth == 0) return NULL;
    return &rava_frame_pool[rava_frame_depth - 1];
}

size_t rava_fastframe_get_depth(void) {
    return rava_frame_depth;
}

void rava_fastframe_reset(void) {
    rava_frame_depth = 0;
}