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/*--------------------------------------------------------------------
* Symbols referenced in this file:
* - CritSectionCount
* - ExitOnAnyError
* - InterruptHoldoffCount
* - QueryCancelHoldoffCount
* - IsPostmasterEnvironment
* - InterruptPending
*--------------------------------------------------------------------
*/
/*-------------------------------------------------------------------------
*
* globals.c
* global variable declarations
*
* Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* src/backend/utils/init/globals.c
*
* NOTES
* Globals used all over the place should be declared here and not
* in other modules.
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "common/file_perm.h"
#include "libpq/libpq-be.h"
#include "libpq/pqcomm.h"
#include "miscadmin.h"
#include "storage/backendid.h"
__thread volatile sig_atomic_t InterruptPending = false;
__thread volatile uint32 InterruptHoldoffCount = 0;
__thread volatile uint32 QueryCancelHoldoffCount = 0;
__thread volatile uint32 CritSectionCount = 0;
/*
* MyLatch points to the latch that should be used for signal handling by the
* current process. It will either point to a process local latch if the
* current process does not have a PGPROC entry in that moment, or to
* PGPROC->procLatch if it has. Thus it can always be used in signal handlers,
* without checking for its existence.
*/
/*
* DataDir is the absolute path to the top level of the PGDATA directory tree.
* Except during early startup, this is also the server's working directory;
* most code therefore can simply use relative paths and not reference DataDir
* explicitly.
*/
/*
* Mode of the data directory. The default is 0700 but it may be changed in
* checkDataDir() to 0750 if the data directory actually has that mode.
*/
/* debugging output file */
/* full path to my executable */
/* full path to lib directory */
#ifdef EXEC_BACKEND
char postgres_exec_path[MAXPGPATH]; /* full path to backend */
/* note: currently this is not valid in backend processes */
#endif
/*
* DatabasePath is the path (relative to DataDir) of my database's
* primary directory, ie, its directory in the default tablespace.
*/
/*
* IsPostmasterEnvironment is true in a postmaster process and any postmaster
* child process; it is false in a standalone process (bootstrap or
* standalone backend). IsUnderPostmaster is true in postmaster child
* processes. Note that "child process" includes all children, not only
* regular backends. These should be set correctly as early as possible
* in the execution of a process, so that error handling will do the right
* things if an error should occur during process initialization.
*
* These are initialized for the bootstrap/standalone case.
*/
__thread bool IsPostmasterEnvironment = false;
__thread bool ExitOnAnyError = false;
/*
* Primary determinants of sizes of shared-memory structures.
*
* MaxBackends is computed by PostmasterMain after modules have had a chance to
* register background workers.
*/
/* GUC parameters for vacuum */
/* working state for vacuum */