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eliminate attempts at clever read-only synchronization in file stream & ctrl layer, just fall back to simple locking mechanism

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This commit is contained in:
Ryan Fleury
2024-11-10 11:23:02 -08:00
parent bd4f82c8e8
commit 31f25d0fe7
4 changed files with 18 additions and 25 deletions
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src/ctrl/ctrl_core.c
+4 -5
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@@ -1253,8 +1253,7 @@ ctrl_init(void)
for(U64 idx = 0; idx < ctrl_state->thread_reg_cache.stripes_count; idx += 1)
{
ctrl_state->thread_reg_cache.stripes[idx].arena = arena_alloc();
ctrl_state->thread_reg_cache.stripes[idx].r_mutex = os_rw_mutex_alloc();
ctrl_state->thread_reg_cache.stripes[idx].w_mutex = os_rw_mutex_alloc();
ctrl_state->thread_reg_cache.stripes[idx].rw_mutex = os_rw_mutex_alloc();
}
ctrl_state->module_image_info_cache.slots_count = 1024;
ctrl_state->module_image_info_cache.slots = push_array(arena, CTRL_ModuleImageInfoCacheSlot, ctrl_state->module_image_info_cache.slots_count);
@@ -1780,7 +1779,7 @@ ctrl_query_cached_reg_block_from_thread(Arena *arena, CTRL_EntityStore *store, C
CTRL_ThreadRegCacheSlot *slot = &cache->slots[slot_idx];
CTRL_ThreadRegCacheStripe *stripe = &cache->stripes[stripe_idx];
void *result = push_array(arena, U8, reg_block_size);
OS_MutexScopeR(stripe->r_mutex)
OS_MutexScopeW(stripe->rw_mutex)
{
// rjf: find existing node
CTRL_ThreadRegCacheNode *node = 0;
@@ -1794,7 +1793,7 @@ ctrl_query_cached_reg_block_from_thread(Arena *arena, CTRL_EntityStore *store, C
}
// rjf: allocate existing node
if(!node) OS_MutexScopeW(stripe->w_mutex) OS_MutexScopeRWPromote(stripe->r_mutex)
if(!node)
{
node = push_array(stripe->arena, CTRL_ThreadRegCacheNode, 1);
DLLPushBack(slot->first, slot->last, node);
@@ -1810,7 +1809,7 @@ ctrl_query_cached_reg_block_from_thread(Arena *arena, CTRL_EntityStore *store, C
B32 need_stale = 1;
if(node->reg_gen != current_reg_gen && dmn_thread_read_reg_block(handle.dmn_handle, result))
{
OS_MutexScopeW(stripe->w_mutex) OS_MutexScopeRWPromote(stripe->r_mutex) if(node != 0)
if(node != 0)
{
need_stale = 0;
node->reg_gen = current_reg_gen;