diff options
Diffstat (limited to 'include/ruby/ruby.h')
-rw-r--r-- | include/ruby/ruby.h | 12 |
1 files changed, 12 insertions, 0 deletions
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)) |