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Changed zend_smart_str allocation granularity to do the better job together with Zend MM and avoid useless calls to erealloc().

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This commit is contained in:
Dmitry Stogov 2015-04-16 12:32:56 +03:00
parent a759967dd1
commit 5275e5560b
3 changed files with 25 additions and 16 deletions
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10
Zend/zend_alloc.c
View file

@ -287,16 +287,6 @@ struct _zend_mm_bin {
char bytes[ZEND_MM_PAGE_SIZE * 8];
};
#if ZEND_DEBUG
typedef struct _zend_mm_debug_info {
size_t size;
const char *filename;
const char *orig_filename;
uint lineno;
uint orig_lineno;
} zend_mm_debug_info;
#endif
struct _zend_mm_free_slot {
zend_mm_free_slot *next_free_slot;
};

14
Zend/zend_alloc.h
View file

@ -50,6 +50,20 @@ typedef struct _zend_leak_info {
uint orig_lineno;
} zend_leak_info;
#if ZEND_DEBUG
typedef struct _zend_mm_debug_info {
size_t size;
const char *filename;
const char *orig_filename;
uint lineno;
uint orig_lineno;
} zend_mm_debug_info;
# define ZEND_MM_OVERHEAD ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_debug_info))
#else
# define ZEND_MM_OVERHEAD 0
#endif
BEGIN_EXTERN_C()
ZEND_API char* ZEND_FASTCALL zend_strndup(const char *s, size_t length) ZEND_ATTRIBUTE_MALLOC;

17
Zend/zend_smart_str.h
View file

@ -22,14 +22,19 @@
#include <zend.h>
#include "zend_smart_str_public.h"
#ifndef SMART_STR_PREALLOC
#define SMART_STR_PREALLOC 128
#define SMART_STR_OVERHEAD (ZEND_MM_OVERHEAD + _STR_HEADER_SIZE)
#ifndef SMART_STR_PAGE
# define SMART_STR_PAGE 4096
#endif
#ifndef SMART_STR_START_SIZE
#define SMART_STR_START_SIZE 78
# define SMART_STR_START_SIZE (256 - SMART_STR_OVERHEAD - 1)
#endif
#define SMART_STR_NEW_SIZE(newlen) \
(((newlen + SMART_STR_OVERHEAD + SMART_STR_PAGE) & ~(SMART_STR_PAGE - 1)) - SMART_STR_OVERHEAD - 1)
#define smart_str_appends_ex(dest, src, what) \
smart_str_appendl_ex((dest), (src), strlen(src), (what))
#define smart_str_appends(dest, src) \
@ -55,14 +60,14 @@ static zend_always_inline size_t smart_str_alloc(smart_str *str, size_t len, zen
newlen = len;
str->a = newlen < SMART_STR_START_SIZE
? SMART_STR_START_SIZE
: newlen + SMART_STR_PREALLOC;
: SMART_STR_NEW_SIZE(newlen);
str->s = zend_string_alloc(str->a, persistent);
str->s->len = 0;
} else {
newlen = str->s->len + len;
if (newlen >= str->a) {
str->a = newlen + SMART_STR_PREALLOC;
str->s = (zend_string *) perealloc(str->s, _STR_HEADER_SIZE + str->a + 1, persistent);
str->a = SMART_STR_NEW_SIZE(newlen);
str->s = (zend_string *) perealloc2(str->s, _STR_HEADER_SIZE + str->a + 1, _STR_HEADER_SIZE + str->s->len + 1, persistent);
}
}
return newlen;