Mercurial > hg > nginx
view src/core/ngx_config.h @ 8078:5244d3b165ff
SSL: single allocation in session cache on 32-bit platforms.
Given the present typical SSL session sizes, on 32-bit platforms it is
now beneficial to store all data in a single allocation, since rbtree
node + session id + ASN1 representation of a session takes 256 bytes of
shared memory (36 + 32 + 150 = about 218 bytes plus SNI server name).
Storing all data in a single allocation is beneficial for SNI names up to
about 40 characters long and makes it possible to store about 4000 sessions
in one megabyte (instead of about 3000 sessions now). This also slightly
simplifies the code.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Wed, 12 Oct 2022 20:14:40 +0300 |
parents | d200a0fd00b7 |
children |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #ifndef _NGX_CONFIG_H_INCLUDED_ #define _NGX_CONFIG_H_INCLUDED_ #include <ngx_auto_headers.h> #if defined __DragonFly__ && !defined __FreeBSD__ #define __FreeBSD__ 4 #define __FreeBSD_version 480101 #endif #if (NGX_FREEBSD) #include <ngx_freebsd_config.h> #elif (NGX_LINUX) #include <ngx_linux_config.h> #elif (NGX_SOLARIS) #include <ngx_solaris_config.h> #elif (NGX_DARWIN) #include <ngx_darwin_config.h> #elif (NGX_WIN32) #include <ngx_win32_config.h> #else /* POSIX */ #include <ngx_posix_config.h> #endif #ifndef NGX_HAVE_SO_SNDLOWAT #define NGX_HAVE_SO_SNDLOWAT 1 #endif #if !(NGX_WIN32) #define ngx_signal_helper(n) SIG##n #define ngx_signal_value(n) ngx_signal_helper(n) #define ngx_random random /* TODO: #ifndef */ #define NGX_SHUTDOWN_SIGNAL QUIT #define NGX_TERMINATE_SIGNAL TERM #define NGX_NOACCEPT_SIGNAL WINCH #define NGX_RECONFIGURE_SIGNAL HUP #if (NGX_LINUXTHREADS) #define NGX_REOPEN_SIGNAL INFO #define NGX_CHANGEBIN_SIGNAL XCPU #else #define NGX_REOPEN_SIGNAL USR1 #define NGX_CHANGEBIN_SIGNAL USR2 #endif #define ngx_cdecl #define ngx_libc_cdecl #endif typedef intptr_t ngx_int_t; typedef uintptr_t ngx_uint_t; typedef intptr_t ngx_flag_t; #define NGX_INT32_LEN (sizeof("-2147483648") - 1) #define NGX_INT64_LEN (sizeof("-9223372036854775808") - 1) #if (NGX_PTR_SIZE == 4) #define NGX_INT_T_LEN NGX_INT32_LEN #define NGX_MAX_INT_T_VALUE 2147483647 #else #define NGX_INT_T_LEN NGX_INT64_LEN #define NGX_MAX_INT_T_VALUE 9223372036854775807 #endif #ifndef NGX_ALIGNMENT #define NGX_ALIGNMENT sizeof(unsigned long) /* platform word */ #endif #define ngx_align(d, a) (((d) + (a - 1)) & ~(a - 1)) #define ngx_align_ptr(p, a) \ (u_char *) (((uintptr_t) (p) + ((uintptr_t) a - 1)) & ~((uintptr_t) a - 1)) #define ngx_abort abort /* TODO: platform specific: array[NGX_INVALID_ARRAY_INDEX] must cause SIGSEGV */ #define NGX_INVALID_ARRAY_INDEX 0x80000000 /* TODO: auto_conf: ngx_inline inline __inline __inline__ */ #ifndef ngx_inline #define ngx_inline inline #endif #ifndef INADDR_NONE /* Solaris */ #define INADDR_NONE ((unsigned int) -1) #endif #ifdef MAXHOSTNAMELEN #define NGX_MAXHOSTNAMELEN MAXHOSTNAMELEN #else #define NGX_MAXHOSTNAMELEN 256 #endif #define NGX_MAX_UINT32_VALUE (uint32_t) 0xffffffff #define NGX_MAX_INT32_VALUE (uint32_t) 0x7fffffff #if (NGX_COMPAT) #define NGX_COMPAT_BEGIN(slots) uint64_t spare[slots]; #define NGX_COMPAT_END #else #define NGX_COMPAT_BEGIN(slots) #define NGX_COMPAT_END #endif #endif /* _NGX_CONFIG_H_INCLUDED_ */