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* include/ruby/ruby.h (ALLOCV): new API for exception-safe

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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
This commit is contained in:
nobu 2011-01-26 23:32:22 +00:00
parent d6eb807878
commit 8489ac41ca
3 changed files with 38 additions and 0 deletions
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8
ChangeLog
View file

@ -1,3 +1,11 @@
Thu Jan 27 08:32:17 2011 Nobuyoshi Nakada <nobu@ruby-lang.org>
* 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.
Thu Jan 27 08:22:49 2011 Nobuyoshi Nakada <nobu@ruby-lang.org>
* dln_find.c (dln_find_1): use rb_warning and return immediately

12
include/ruby/ruby.h
View file

@ -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))

18
string.c
View file

@ -45,6 +45,8 @@
#undef rb_str_buf_cat2
#undef rb_str_cat2
static VALUE rb_str_clear(VALUE str);
VALUE rb_cString;
VALUE rb_cSymbol;
@ -765,6 +767,22 @@ rb_str_tmp_new(long len)
return str_new(0, 0, len);
}
void *
rb_alloc_tmp_buffer(volatile VALUE *store, long len)
{
VALUE s = rb_str_tmp_new(len);
*store = s;
return RSTRING_PTR(s);
}
void
rb_free_tmp_buffer(volatile VALUE *store)
{
VALUE s = *store;
*store = 0;
if (s) rb_str_clear(s);
}
void
rb_str_free(VALUE str)
{