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util_bump_cache.c (2030B)

      1 //////////////////////////////////////////////////////////////////
      2 // render_vertex_cache.c
      3 
      4 RV_GLOBAL void rv_bump_cache_create(rv_bump_cache_ctx_t* bc, s64 element_size)
      5 {
      6     rv_bump_cache_destroy(bc);
      7     bc->element_size = element_size;
      8 
      9     // TODO(Samdal):
     10     // Check if the arena implementation supports virtual paging first...
     11     bc->arena = rv_arena_alloc(.flags = rv_arena_flag_no_chain, .reserve_size = GB(1));
     12 }
     13 
     14 RV_GLOBAL void rv_bump_cache_destroy(rv_bump_cache_ctx_t* bc)
     15 {
     16     if (bc->arena) {
     17         rv_arena_release(bc->arena);
     18     }
     19     *bc = (rv_bump_cache_ctx_t){0};
     20 }
     21 
     22 RV_GLOBAL void* rv_bump_cache_push(rv_bump_cache_ctx_t* bc, const void* new)
     23 {
     24     return rv_bump_cache_push_many(bc, new, 1);
     25 }
     26 RV_GLOBAL void* rv_bump_cache_push_many(rv_bump_cache_ctx_t* bc, const void* new, s64 count)
     27 {
     28     rv_assert(bc->element_size > 0);
     29 
     30     void* res = rv_arena_push(bc->arena, bc->element_size * count, 1);
     31     rv_mem_copy(res, new, bc->element_size * count);
     32 
     33     if (!bc->begin) {
     34         bc->begin = res;
     35         rv_assert(bc->total_count == 0);
     36         rv_assert(bc->committed_so_far == 0);
     37     }
     38 
     39     bc->current_count += count;
     40     bc->total_count += count;
     41 
     42     return res;
     43 }
     44 
     45 RV_GLOBAL void rv_bump_cache_break(rv_bump_cache_ctx_t* bc, s64* offset_out, s64* count_out) {
     46     if (offset_out) *offset_out = bc->committed_so_far;
     47     if (count_out) *count_out = bc->current_count;
     48 
     49     rv_command_t res = {0};
     50 
     51     bc->committed_so_far += bc->current_count;
     52 
     53     bc->current_count = 0;
     54 }
     55 
     56 RV_GLOBAL void rv_bump_cache_upload_and_reset(rv_bump_cache_ctx_t* bc, rv_arena* arena, void** data_out, s64* size_out)
     57 {
     58     // copy over data into new arena
     59     *data_out = rv_arena_push(arena, bc->total_count * bc->element_size, 8);
     60     rv_mem_copy(*data_out, bc->begin, bc->total_count * bc->element_size);
     61     *size_out = bc->total_count * bc->element_size;
     62 
     63     // reset
     64     rv_arena_clear(bc->arena);
     65     bc->begin = NULL;
     66     bc->current_count = 0;
     67     bc->committed_so_far = 0;
     68     bc->total_count = 0;
     69 }