postmaster.h

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/*-------------------------------------------------------------------------
 *
 * postmaster.h
 *    Exports from postmaster/postmaster.c.
 *
 * Portions Copyright (c) 1996-2013, 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 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 const char *progname;

extern void PostmasterMain(int argc, char *argv[]) __attribute__((noreturn));
extern void ClosePostmasterPorts(bool am_syslogger);

extern int  MaxLivePostmasterChildren(void);

extern int GetNumShmemAttachedBgworkers(void);

#ifdef EXEC_BACKEND
extern pid_t postmaster_forkexec(int argc, char *argv[]);
extern void SubPostmasterMain(int argc, char *argv[]) __attribute__((noreturn));

extern Size ShmemBackendArraySize(void);
extern void ShmemBackendArrayAllocation(void);
#endif

/*
 * Note: MAX_BACKENDS is limited to 2^23-1 because inval.c stores the
 * backend ID as a 3-byte signed integer.  Even if that limitation were
 * removed, we still could not exceed 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    0x7fffff

#endif   /* _POSTMASTER_H */