From a3eb950423cfdf11f48080652089dfd39465cb02 Mon Sep 17 00:00:00 2001
From: David Carlier <devnexen@gmail.com>
Date: Fri, 26 May 2023 12:05:19 +0000
Subject: [PATCH] std.c: haiku also supports malloc_usable_size to benefit
 zig's heap

---
 lib/std/c/haiku.zig | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/std/c/haiku.zig b/lib/std/c/haiku.zig
index 53930cdca7..2e0e02a20f 100644
--- a/lib/std/c/haiku.zig
+++ b/lib/std/c/haiku.zig
@@ -1071,3 +1071,5 @@ pub const sigevent = extern struct {
 
 /// TODO refines if necessary
 pub const PTHREAD_STACK_MIN = 2 * 4096;
+
+pub extern "c" fn malloc_usable_size(?*anyopaque) usize;