From d18477deea5364847ca6d4be1ce6baa6c8c3fa9c Mon Sep 17 00:00:00 2001 From: Francisco Jerez Date: Wed, 9 Oct 2013 11:02:51 -0700 Subject: [PATCH] ralloc: Hook up C++ destructors to ralloc when necessary. This patch makes sure that class destructors are called as they should be when a C++ object allocated by ralloc is released. Based on a previous patch by Kenneth Graunke, but it doesn't exhibit the ~0.8% performance regression in shader compilation times because we now use the HAS_TRIVIAL_DESTRUCTOR() macro to detect the typical case where the indirect function call can be avoided because the object's destructor doesn't need to do anything. Reviewed-by: Ian Romanick --- src/glsl/ralloc.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/src/glsl/ralloc.h b/src/glsl/ralloc.h index 31682d515e6..4581a7a4e41 100644 --- a/src/glsl/ralloc.h +++ b/src/glsl/ralloc.h @@ -415,15 +415,29 @@ bool ralloc_vasprintf_append(char **str, const char *fmt, va_list args); * which is more idiomatic in C++ than calling ralloc. */ #define DECLARE_RALLOC_CXX_OPERATORS(TYPE) \ +private: \ + static void _ralloc_destructor(void *p) \ + { \ + reinterpret_cast(p)->~TYPE(); \ + } \ +public: \ static void* operator new(size_t size, void *mem_ctx) \ { \ void *p = ralloc_size(mem_ctx, size); \ assert(p != NULL); \ + if (!HAS_TRIVIAL_DESTRUCTOR(TYPE)) \ + ralloc_set_destructor(p, _ralloc_destructor); \ return p; \ } \ \ static void operator delete(void *p) \ { \ + /* The object's destructor is guaranteed to have already been \ + * called by the delete operator at this point -- Make sure it's \ + * not called again. \ + */ \ + if (!HAS_TRIVIAL_DESTRUCTOR(TYPE)) \ + ralloc_set_destructor(p, NULL); \ ralloc_free(p); \ } -- 2.30.2