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Properly maintain the ArenaPool's free_list_len

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This commit is contained in:
Karl Seguin
2026-02-03 13:08:53 +08:00
parent 8d51383fb2
commit 933e2fb0ef
1 changed files with 4 additions and 1 deletions
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5
src/ArenaPool.zig
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@@ -56,6 +56,7 @@ pub fn deinit(self: *ArenaPool) void {
pub fn acquire(self: *ArenaPool) !Allocator { pub fn acquire(self: *ArenaPool) !Allocator {
if (self.free_list) |entry| { if (self.free_list) |entry| {
self.free_list = entry.next; self.free_list = entry.next;
self.free_list_len -= 1;
return entry.arena.allocator(); return entry.arena.allocator();
} }
@@ -72,7 +73,8 @@ pub fn release(self: *ArenaPool, allocator: Allocator) void {
const arena: *std.heap.ArenaAllocator = @ptrCast(@alignCast(allocator.ptr)); const arena: *std.heap.ArenaAllocator = @ptrCast(@alignCast(allocator.ptr));
const entry: *Entry = @fieldParentPtr("arena", arena); const entry: *Entry = @fieldParentPtr("arena", arena);
if (self.free_list_len == self.free_list_max) { const free_list_len = self.free_list_len;
if (free_list_len == self.free_list_max) {
arena.deinit(); arena.deinit();
self.entry_pool.destroy(entry); self.entry_pool.destroy(entry);
return; return;
@@ -80,5 +82,6 @@ pub fn release(self: *ArenaPool, allocator: Allocator) void {
_ = arena.reset(.{ .retain_with_limit = self.retain_bytes }); _ = arena.reset(.{ .retain_with_limit = self.retain_bytes });
entry.next = self.free_list; entry.next = self.free_list;
self.free_list_len = free_list_len + 1;
self.free_list = entry; self.free_list = entry;
} }