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Align data payload for better performance.

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This commit is contained in:
Andy Polyakov
2006-10-20 11:26:00 +00:00
parent 1e7b6c029c
commit a4d64c7f49
3 changed files with 126 additions and 56 deletions
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22
ssl/ssl3.h
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@@ -248,12 +248,27 @@ extern "C" {
#define SSL3_SESSION_ID_SIZE 32
#define SSL3_RT_HEADER_LENGTH 5
#ifndef SSL3_ALIGN_PAYLOAD
/* Some will argue that this increases memory footprint, but it's
* not actually true. Point is that malloc has to return at least
* 64-bit aligned pointers, meaning that allocating 5 bytes wastes
* 3 bytes in either case. Suggested pre-gaping simply moves these
* wasted bytes from the end of allocated region to its front,
* but makes data payload aligned, which improves performance:-) */
# define SSL3_ALIGN_PAYLOAD 8
#else
# if (SSL3_ALIGN_PAYLOAD&(SSL3_ALIGN_PAYLOAD-1))!=0
# error "insane SSL3_ALIGN_PAYLOAD"
# undef SSL3_ALIGN_PAYLOAD
# endif
#endif
/* This is the maximum MAC (digest) size used by the SSL library.
* Currently this is 20 when SHA1 is used. This must be updated if larger
* digests are used in future.
* Currently maximum of 20 is used by SHA1, but we reserve for
* future extension for 512-bit hashes.
*/
#define SSL3_RT_MAX_MD_SIZE 20
#define SSL3_RT_MAX_MD_SIZE 64
/* Maximum block size used in all ciphersuites. Currently 16 for AES.
*/
@@ -292,7 +307,6 @@ extern "C" {
(SSL3_RT_MAX_ENCRYPTED_OVERHEAD+SSL3_RT_MAX_COMPRESSED_LENGTH)
#define SSL3_RT_MAX_PACKET_SIZE \
(SSL3_RT_MAX_ENCRYPTED_LENGTH+SSL3_RT_HEADER_LENGTH)
#define SSL3_RT_MAX_DATA_SIZE (1024*1024)
#define SSL3_MD_CLIENT_FINISHED_CONST "\x43\x4C\x4E\x54"
#define SSL3_MD_SERVER_FINISHED_CONST "\x53\x52\x56\x52"