From 8489ac41cadc1ef80ea57799bc833a831d1afdc6 Mon Sep 17 00:00:00 2001 From: nobu Date: Wed, 26 Jan 2011 23:32:22 +0000 Subject: * include/ruby/ruby.h (ALLOCV): new API for exception-safe temporary buffer. [ruby-core:34844] * string.c (rb_alloc_tmp_buffer, rb_free_tmp_buffer): implementation of the API. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@30661 b2dd03c8-39d4-4d8f-98ff-823fe69b080e --- include/ruby/ruby.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'include') diff --git a/include/ruby/ruby.h b/include/ruby/ruby.h index 4e15517377..aca517ca61 100644 --- a/include/ruby/ruby.h +++ b/include/ruby/ruby.h @@ -1028,6 +1028,18 @@ NUM2CHR(VALUE x) #define ALLOCA_N(type,n) (type*)alloca(sizeof(type)*(n)) +void *rb_alloc_tmp_buffer(volatile VALUE *store, long len); +void rb_free_tmp_buffer(volatile VALUE *store); +/* allocates _n_ bytes temporary buffer and stores VALUE including it + * in _v_. _n_ may be evaluated twice. */ +#ifdef C_ALLOCA +# define ALLOCV(v, n) rb_alloc_tmp_buffer(&(v), (n)) +#else +# define ALLOCV(v, n) ((n) < 1024 ? (RB_GC_GUARD(v) = 0, alloca(n)) : rb_alloc_tmp_buffer(&(v), (n))) +#endif +#define ALLOCV_N(type, v, n) (type*)ALLOCV((v), sizeof(type)*(n)) +#define ALLOCV_END(v) rb_free_tmp_buffer(&(v)) + #define MEMZERO(p,type,n) memset((p), 0, sizeof(type)*(n)) #define MEMCPY(p1,p2,type,n) memcpy((p1), (p2), sizeof(type)*(n)) #define MEMMOVE(p1,p2,type,n) memmove((p1), (p2), sizeof(type)*(n)) -- cgit v1.2.3