ed/metadesk
1
0
Fork 0
mirror of https://github.com/Ed94/metadesk.git synced 2026-07-13 21:11:26 -07:00
Code Issues Packages Projects Releases Wiki Activity

frying my brain coming up with a decent compromise on arena usage...

Browse Source
This commit is contained in:
Edward R. Gonzalez
2025-02-05 15:46:58 -05:00
parent 268271e4a7
commit a41bd8a5f1
7 changed files with 231 additions and 230 deletions
Download Patch File Download Diff File Expand all files Collapse all files
code/base/arena.c
+23 -122
View File
@@ -11,134 +11,35 @@
//- rjf: arena creation/destruction
#if 0
internal Arena*
arena_alloc_(ArenaParams *params)
{
// rjf: round up reserve/commit sizes
U64 reserve_size = params->reserve_size;
U64 commit_size = params->commit_size;
if(params->flags & ArenaFlag_LargePages)
{
reserve_size = AlignPow2(reserve_size, os_get_system_info()->large_page_size);
commit_size = AlignPow2(commit_size, os_get_system_info()->large_page_size);
}
else
{
reserve_size = AlignPow2(reserve_size, os_get_system_info()->page_size);
commit_size = AlignPow2(commit_size, os_get_system_info()->page_size);
}
// rjf: reserve/commit initial block
void *base = params->optional_backing_buffer;
if(base == 0)
{
if(params->flags & ArenaFlag_LargePages)
{
base = os_reserve_large(reserve_size);
os_commit_large(base, commit_size);
}
else
{
base = os_reserve(reserve_size);
os_commit(base, commit_size);
}
}
// rjf: panic on arena creation failure
#if OS_FEATURE_GRAPHICAL
if(Unlikely(base == 0))
{
os_graphical_message(1, str8_lit("Fatal Allocation Failure"), str8_lit("Unexpected memory allocation failure."));
os_abort(1);
}
#endif
// rjf: extract arena header & fill
Arena *arena = (Arena *)base;
arena->current = arena;
arena->flags = params->flags;
arena->cmt_size = (U32)params->commit_size;
arena->res_size = params->reserve_size;
arena->base_pos = 0;
arena->pos = ARENA_HEADER_SIZE;
arena->cmt = commit_size;
arena->res = reserve_size;
AsanPoisonMemoryRegion(base, commit_size);
AsanUnpoisonMemoryRegion(base, ARENA_HEADER_SIZE);
return arena;
}
#endif
Arena*
arena_alloc_(ArenaParams* params)
{
// rjf: round up reserve/commit sizes
U64 reserve_size = params->reserve_size;
U64 commit_size = params->commit_size;
B32 is_virtual = false;
// This composite arena has the ability to decide a default behavior for allocation
if(params->flags & ArenaFlag_LargePages)
{
reserve_size = align_pow2(reserve_size, os_get_system_info()->large_page_size);
commit_size = align_pow2(commit_size, os_get_system_info()->large_page_size);
}
else
{
reserve_size = align_pow2(reserve_size, os_get_system_info()->page_size);
commit_size = align_pow2(commit_size, os_get_system_info()->page_size);
}
void* base = alloc(params->backing, params->block_size);
// rjf: reserve/commit initial block
void *base = params->optional_backing_buffer;
if(base == 0)
{
if(params->flags & ArenaFlag_LargePages)
{
base = os_reserve_large(reserve_size);
os_commit_large(base, commit_size);
}
else
{
base = os_reserve(reserve_size);
os_commit(base, commit_size);
}
}
// rjf: panic on arena creation failure
// rjf: panic on arena creation failure
#if OS_FEATURE_GRAPHICAL
if(Unlikely(base == 0))
{
os_graphical_message(1, str8_lit("Fatal Allocation Failure"), str8_lit("Unexpected memory allocation failure."));
os_abort(1);
}
if(unlikely(base == 0))
{
os_graphical_message(1, str8_lit("Fatal Allocation Failure"), str8_lit("Unexpected memory allocation failure."));
os_abort(1);
}
#endif
// rjf: extract arena header & fill
Arena *arena = (Arena *)base;
arena->current = arena;
arena->flags = params->flags;
arena->cmt_size = (U32)params->commit_size;
arena->res_size = params->reserve_size;
arena->base_pos = 0;
arena->pos = ARENA_HEADER_SIZE;
arena->cmt = commit_size;
arena->res = reserve_size;
AsanPoisonMemoryRegion(base, commit_size);
AsanUnpoisonMemoryRegion(base, ARENA_HEADER_SIZE);
return arena;
}
// rjf: extract arena header & fill
Arena* arena = (Arena*) base;
arena->current = arena;
arena->backing = params->backing;
arena->pos = size_of(Arena);
arena->block_size = params->block_size;
arena->flags = params->flags;
// Note(Ed): INLINED
// internal void
// arena_release(Arena *arena)
// {
// for(Arena *n = arena->current, *prev = 0; n != 0; n = prev)
// {
// prev = n->prev;
// os_release(n, n->res);
// }
// }
asan_unpoison_memory_region(base, sizeof(Arena));
return arena;
}
//- rjf: arena push/pop core functions
@@ -247,16 +148,16 @@ arena_pop(Arena *arena, U64 amt)
//- rjf: temporary arena scopes
internal Temp
internal TempArena
temp_begin(Arena *arena)
{
U64 pos = arena_pos(arena);
Temp temp = {arena, pos};
U64 pos = arena_pos(arena);
TempArena temp = {arena, pos};
return temp;
}
internal void
temp_end(Temp temp)
temp_end(TempArena temp)
{
arena_pop_to(temp.arena, temp.pos);
}