Server IP : 103.119.228.120 / Your IP : 13.58.161.115 Web Server : Apache System : Linux v8.techscape8.com 3.10.0-1160.119.1.el7.tuxcare.els2.x86_64 #1 SMP Mon Jul 15 12:09:18 UTC 2024 x86_64 User : nobody ( 99) PHP Version : 5.6.40 Disable Function : shell_exec,symlink,system,exec,proc_get_status,proc_nice,proc_terminate,define_syslog_variables,syslog,openlog,closelog,escapeshellcmd,passthru,ocinum cols,ini_alter,leak,listen,chgrp,apache_note,apache_setenv,debugger_on,debugger_off,ftp_exec,dl,dll,myshellexec,proc_open,socket_bind,proc_close,escapeshellarg,parse_ini_filepopen,fpassthru,exec,passthru,escapeshellarg,escapeshellcmd,proc_close,proc_open,ini_alter,popen,show_source,proc_nice,proc_terminate,proc_get_status,proc_close,pfsockopen,leak,apache_child_terminate,posix_kill,posix_mkfifo,posix_setpgid,posix_setsid,posix_setuid,dl,symlink,shell_exec,system,dl,passthru,escapeshellarg,escapeshellcmd,myshellexec,c99_buff_prepare,c99_sess_put,fpassthru,getdisfunc,fx29exec,fx29exec2,is_windows,disp_freespace,fx29sh_getupdate,fx29_buff_prepare,fx29_sess_put,fx29shexit,fx29fsearch,fx29ftpbrutecheck,fx29sh_tools,fx29sh_about,milw0rm,imagez,sh_name,myshellexec,checkproxyhost,dosyayicek,c99_buff_prepare,c99_sess_put,c99getsource,c99sh_getupdate,c99fsearch,c99shexit,view_perms,posix_getpwuid,posix_getgrgid,posix_kill,parse_perms,parsesort,view_perms_color,set_encoder_input,ls_setcheckboxall,ls_reverse_all,rsg_read,rsg_glob,selfURL,dispsecinfo,unix2DosTime,addFile,system,get_users,view_size,DirFiles,DirFilesWide,DirPrintHTMLHeaders,GetFilesTotal,GetTitles,GetTimeTotal,GetMatchesCount,GetFileMatchesCount,GetResultFiles,fs_copy_dir,fs_copy_obj,fs_move_dir,fs_move_obj,fs_rmdir,SearchText,getmicrotime MySQL : ON | cURL : ON | WGET : ON | Perl : ON | Python : ON | Sudo : ON | Pkexec : ON Directory : /usr/local/ssl/local/ssl/local/ssl/include/pgsql/server/storage/ |
Upload File : |
/*------------------------------------------------------------------------- * * itemid.h * Standard POSTGRES buffer page item identifier definitions. * * * Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * * src/include/storage/itemid.h * *------------------------------------------------------------------------- */ #ifndef ITEMID_H #define ITEMID_H /* * An item pointer (also called line pointer) on a buffer page * * In some cases an item pointer is "in use" but does not have any associated * storage on the page. By convention, lp_len == 0 in every item pointer * that does not have storage, independently of its lp_flags state. */ typedef struct ItemIdData { unsigned lp_off:15, /* offset to tuple (from start of page) */ lp_flags:2, /* state of item pointer, see below */ lp_len:15; /* byte length of tuple */ } ItemIdData; typedef ItemIdData *ItemId; /* * lp_flags has these possible states. An UNUSED line pointer is available * for immediate re-use, the other states are not. */ #define LP_UNUSED 0 /* unused (should always have lp_len=0) */ #define LP_NORMAL 1 /* used (should always have lp_len>0) */ #define LP_REDIRECT 2 /* HOT redirect (should have lp_len=0) */ #define LP_DEAD 3 /* dead, may or may not have storage */ /* * Item offsets and lengths are represented by these types when * they're not actually stored in an ItemIdData. */ typedef uint16 ItemOffset; typedef uint16 ItemLength; /* ---------------- * support macros * ---------------- */ /* * ItemIdGetLength */ #define ItemIdGetLength(itemId) \ ((itemId)->lp_len) /* * ItemIdGetOffset */ #define ItemIdGetOffset(itemId) \ ((itemId)->lp_off) /* * ItemIdGetFlags */ #define ItemIdGetFlags(itemId) \ ((itemId)->lp_flags) /* * ItemIdGetRedirect * In a REDIRECT pointer, lp_off holds the link to the next item pointer */ #define ItemIdGetRedirect(itemId) \ ((itemId)->lp_off) /* * ItemIdIsValid * True iff item identifier is valid. * This is a pretty weak test, probably useful only in Asserts. */ #define ItemIdIsValid(itemId) PointerIsValid(itemId) /* * ItemIdIsUsed * True iff item identifier is in use. */ #define ItemIdIsUsed(itemId) \ ((itemId)->lp_flags != LP_UNUSED) /* * ItemIdIsNormal * True iff item identifier is in state NORMAL. */ #define ItemIdIsNormal(itemId) \ ((itemId)->lp_flags == LP_NORMAL) /* * ItemIdIsRedirected * True iff item identifier is in state REDIRECT. */ #define ItemIdIsRedirected(itemId) \ ((itemId)->lp_flags == LP_REDIRECT) /* * ItemIdIsDead * True iff item identifier is in state DEAD. */ #define ItemIdIsDead(itemId) \ ((itemId)->lp_flags == LP_DEAD) /* * ItemIdHasStorage * True iff item identifier has associated storage. */ #define ItemIdHasStorage(itemId) \ ((itemId)->lp_len != 0) /* * ItemIdSetUnused * Set the item identifier to be UNUSED, with no storage. * Beware of multiple evaluations of itemId! */ #define ItemIdSetUnused(itemId) \ ( \ (itemId)->lp_flags = LP_UNUSED, \ (itemId)->lp_off = 0, \ (itemId)->lp_len = 0 \ ) /* * ItemIdSetNormal * Set the item identifier to be NORMAL, with the specified storage. * Beware of multiple evaluations of itemId! */ #define ItemIdSetNormal(itemId, off, len) \ ( \ (itemId)->lp_flags = LP_NORMAL, \ (itemId)->lp_off = (off), \ (itemId)->lp_len = (len) \ ) /* * ItemIdSetRedirect * Set the item identifier to be REDIRECT, with the specified link. * Beware of multiple evaluations of itemId! */ #define ItemIdSetRedirect(itemId, link) \ ( \ (itemId)->lp_flags = LP_REDIRECT, \ (itemId)->lp_off = (link), \ (itemId)->lp_len = 0 \ ) /* * ItemIdSetDead * Set the item identifier to be DEAD, with no storage. * Beware of multiple evaluations of itemId! */ #define ItemIdSetDead(itemId) \ ( \ (itemId)->lp_flags = LP_DEAD, \ (itemId)->lp_off = 0, \ (itemId)->lp_len = 0 \ ) /* * ItemIdMarkDead * Set the item identifier to be DEAD, keeping its existing storage. * * Note: in indexes, this is used as if it were a hint-bit mechanism; * we trust that multiple processors can do this in parallel and get * the same result. */ #define ItemIdMarkDead(itemId) \ ( \ (itemId)->lp_flags = LP_DEAD \ ) #endif /* ITEMID_H */