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/*-------------------------------------------------------------------------
*
* postmaster.h
* Exports from postmaster/postmaster.c.
*
* Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/include/postmaster/postmaster.h
*
*-------------------------------------------------------------------------
*/
#ifndef _POSTMASTER_H
#define _POSTMASTER_H
/* GUC options */
extern bool EnableSSL;
extern int ReservedBackends;
extern PGDLLIMPORT int PostPortNumber;
extern int Unix_socket_permissions;
extern char *Unix_socket_group;
extern char *Unix_socket_directories;
extern char *ListenAddresses;
extern bool ClientAuthInProgress;
extern int PreAuthDelay;
extern int AuthenticationTimeout;
extern bool Log_connections;
extern bool log_hostname;
extern bool enable_bonjour;
extern char *bonjour_name;
extern bool restart_after_crash;
#ifdef WIN32
extern HANDLE PostmasterHandle;
#else
extern int postmaster_alive_fds[2];
/*
* Constants that represent which of postmaster_alive_fds is held by
* postmaster, and which is used in children to check for postmaster death.
*/
#define POSTMASTER_FD_WATCH 0 /* used in children to check for
* postmaster death */
#define POSTMASTER_FD_OWN 1 /* kept open by postmaster only */
#endif
extern PGDLLIMPORT const char *progname;
extern void PostmasterMain(int argc, char *argv[]) pg_attribute_noreturn();
extern void ClosePostmasterPorts(bool am_syslogger);
extern void InitProcessGlobals(void);
extern int MaxLivePostmasterChildren(void);
extern bool PostmasterMarkPIDForWorkerNotify(int);
#ifdef EXEC_BACKEND
extern pid_t postmaster_forkexec(int argc, char *argv[]);
extern void SubPostmasterMain(int argc, char *argv[]) pg_attribute_noreturn();
extern Size ShmemBackendArraySize(void);
extern void ShmemBackendArrayAllocation(void);
#endif
/*
* Note: MAX_BACKENDS is limited to 2^18-1 because that's the width reserved
* for buffer references in buf_internals.h. This limitation could be lifted
* by using a 64bit state; but it's unlikely to be worthwhile as 2^18-1
* backends exceed currently realistic configurations. Even if that limitation
* were removed, we still could not a) exceed 2^23-1 because inval.c stores
* the backend ID as a 3-byte signed integer, b) INT_MAX/4 because some places
* compute 4*MaxBackends without any overflow check. This is rechecked in the
* relevant GUC check hooks and in RegisterBackgroundWorker().
*/
#define MAX_BACKENDS 0x3FFFF
#endif /* _POSTMASTER_H */
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