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/*------------------------------------------------------------------------- * * postmaster.h * Exports from postmaster/postmaster.c. * * Portions Copyright (c) 1996-2016, 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 int MaxLivePostmasterChildren(void); extern int GetNumShmemAttachedBgworkers(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 */