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dbbca2cf29
as determined by include-what-you-use (IWYU) While IWYU also suggests to *add* a bunch of #include's (which is its main purpose), this patch does not do that. In some cases, a more specific #include replaces another less specific one. Some manual adjustments of the automatic result: - IWYU currently doesn't know about includes that provide global variable declarations (like -Wmissing-variable-declarations), so those includes are being kept manually. - All includes for port(ability) headers are being kept for now, to play it safe. - No changes of catalog/pg_foo.h to catalog/pg_foo_d.h, to keep the patch from exploding in size. Note that this patch touches just *.c files, so nothing declared in header files changes in hidden ways. As a small example, in src/backend/access/transam/rmgr.c, some IWYU pragma annotations are added to handle a special case there. Discussion: https://www.postgresql.org/message-id/flat/af837490-6b2f-46df-ba05-37ea6a6653fc%40eisentraut.org
138 lines
3.2 KiB
C
138 lines
3.2 KiB
C
/*-------------------------------------------------------------------------
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* auxprocess.c
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* functions related to auxiliary processes.
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*
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*
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* Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* IDENTIFICATION
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* src/backend/postmaster/auxprocess.c
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*-------------------------------------------------------------------------
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*/
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#include "postgres.h"
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#include <unistd.h>
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#include <signal.h>
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#include "miscadmin.h"
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#include "pgstat.h"
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#include "postmaster/auxprocess.h"
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#include "postmaster/bgwriter.h"
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#include "postmaster/startup.h"
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#include "postmaster/walsummarizer.h"
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#include "postmaster/walwriter.h"
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#include "replication/walreceiver.h"
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#include "storage/condition_variable.h"
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#include "storage/ipc.h"
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#include "storage/proc.h"
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#include "storage/procsignal.h"
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#include "utils/ps_status.h"
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static void ShutdownAuxiliaryProcess(int code, Datum arg);
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/*
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* AuxiliaryProcessMain
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*
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* The main entry point for auxiliary processes, such as the bgwriter,
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* walwriter, walreceiver, bootstrapper and the shared memory checker code.
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*
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* This code is here just because of historical reasons.
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*/
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void
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AuxiliaryProcessMain(BackendType auxtype)
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{
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Assert(IsUnderPostmaster);
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MyBackendType = auxtype;
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init_ps_display(NULL);
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SetProcessingMode(BootstrapProcessing);
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IgnoreSystemIndexes = true;
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/*
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* As an auxiliary process, we aren't going to do the full InitPostgres
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* pushups, but there are a couple of things that need to get lit up even
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* in an auxiliary process.
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*/
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/*
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* Create a PGPROC so we can use LWLocks and access shared memory.
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*/
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InitAuxiliaryProcess();
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BaseInit();
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ProcSignalInit();
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/*
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* Auxiliary processes don't run transactions, but they may need a
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* resource owner anyway to manage buffer pins acquired outside
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* transactions (and, perhaps, other things in future).
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*/
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CreateAuxProcessResourceOwner();
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/* Initialize backend status information */
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pgstat_beinit();
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pgstat_bestart();
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/* register a before-shutdown callback for LWLock cleanup */
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before_shmem_exit(ShutdownAuxiliaryProcess, 0);
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SetProcessingMode(NormalProcessing);
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switch (MyBackendType)
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{
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case B_STARTUP:
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StartupProcessMain();
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proc_exit(1);
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case B_ARCHIVER:
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PgArchiverMain();
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proc_exit(1);
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case B_BG_WRITER:
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BackgroundWriterMain();
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proc_exit(1);
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case B_CHECKPOINTER:
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CheckpointerMain();
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proc_exit(1);
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case B_WAL_WRITER:
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WalWriterMain();
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proc_exit(1);
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case B_WAL_RECEIVER:
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WalReceiverMain();
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proc_exit(1);
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case B_WAL_SUMMARIZER:
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WalSummarizerMain();
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proc_exit(1);
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default:
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elog(PANIC, "unrecognized process type: %d", (int) MyBackendType);
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proc_exit(1);
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}
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}
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/*
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* Begin shutdown of an auxiliary process. This is approximately the equivalent
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* of ShutdownPostgres() in postinit.c. We can't run transactions in an
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* auxiliary process, so most of the work of AbortTransaction() is not needed,
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* but we do need to make sure we've released any LWLocks we are holding.
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* (This is only critical during an error exit.)
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*/
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static void
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ShutdownAuxiliaryProcess(int code, Datum arg)
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{
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LWLockReleaseAll();
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ConditionVariableCancelSleep();
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pgstat_report_wait_end();
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}
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