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9bbc195d11
`zend_strtod.c` uses a global state (mostly an allocation freelist) protected by a mutex in ZTS builds. This state is used by `zend_dtoa()`, `zend_strtod()`, and variants. This creates a lot of contention in concurrent loads. `zend_dtoa()` is used to format floats to string, e.g. in sprintf, json_encode, serialize, uniqid. Here I move the global state to the thread specific `executor_globals` and remove the mutex. The impact on non-concurrent environments is null or negligible, but there is a considerable speed up on concurrent environments, especially on Alpine/Musl.
108 lines
2.7 KiB
C
108 lines
2.7 KiB
C
/*
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+----------------------------------------------------------------------+
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| Zend Engine |
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+----------------------------------------------------------------------+
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| Copyright (c) Zend Technologies Ltd. (http://www.zend.com) |
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+----------------------------------------------------------------------+
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| This source file is subject to version 2.00 of the Zend license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| http://www.zend.com/license/2_00.txt. |
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| If you did not receive a copy of the Zend license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@zend.com so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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| Authors: Anatol Belski <ab@php.net> |
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+----------------------------------------------------------------------+
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*/
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#ifndef ZEND_STRTOD_INT_H
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#define ZEND_STRTOD_INT_H
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#ifdef ZTS
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#include <TSRM.h>
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#endif
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#include <stddef.h>
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#include <stdio.h>
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#include <ctype.h>
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#include <stdarg.h>
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#include <math.h>
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#ifdef HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif
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/* TODO check to undef this option, this might
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make more perf. destroy_freelist()
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should be adapted then. */
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#define Omit_Private_Memory 1
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/* HEX strings aren't supported as per
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https://wiki.php.net/rfc/remove_hex_support_in_numeric_strings */
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#define NO_HEX_FP 1
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#include <inttypes.h>
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#ifdef USE_LOCALE
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#undef USE_LOCALE
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#endif
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#ifndef NO_INFNAN_CHECK
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#define NO_INFNAN_CHECK
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#endif
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#ifndef NO_ERRNO
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#define NO_ERRNO
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#endif
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#ifdef WORDS_BIGENDIAN
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#define IEEE_BIG_ENDIAN 1
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#else
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#define IEEE_LITTLE_ENDIAN 1
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#endif
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#if (defined(__APPLE__) || defined(__APPLE_CC__)) && (defined(__BIG_ENDIAN__) || defined(__LITTLE_ENDIAN__))
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# if defined(__LITTLE_ENDIAN__)
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# undef WORDS_BIGENDIAN
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# else
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# if defined(__BIG_ENDIAN__)
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# define WORDS_BIGENDIAN
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# endif
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# endif
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#endif
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#if defined(__arm__) && !defined(__VFP_FP__)
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/*
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* * Although the CPU is little endian the FP has different
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* * byte and word endianness. The byte order is still little endian
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* * but the word order is big endian.
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* */
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#define IEEE_BIG_ENDIAN
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#undef IEEE_LITTLE_ENDIAN
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#endif
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#ifdef __vax__
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#define VAX
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#undef IEEE_LITTLE_ENDIAN
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#endif
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#ifdef IEEE_LITTLE_ENDIAN
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#define IEEE_8087 1
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#endif
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#ifdef IEEE_BIG_ENDIAN
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#define IEEE_MC68k 1
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#endif
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#if defined(_MSC_VER)
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#ifndef int32_t
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#define int32_t __int32
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#endif
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#ifndef uint32_t
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#define uint32_t unsigned __int32
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#endif
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#endif
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#endif /* ZEND_STRTOD_INT_H */
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