Create a separate file listing backend types

Use our established coding pattern to reduce maintenance pain when
adding other per-process-type characteristics.

Like PG_KEYWORD, PG_CMDTAG, PG_RMGR.

To keep the strings translatable, the relevant makefile now also scans
src/include for this specific file.  I didn't want to have it scan all
.h files, as then gettext would have to scan all header files.  I didn't
find any way to affect the meson behavior in this respect though.

Author: Álvaro Herrera <alvherre@kurilemu.de>
Co-authored-by: Jonathan Gonzalez V. <jonathan.abdiel@gmail.com>
Discussion: https://postgr.es/m/202507151830.dwgz5nmmqtdy@alvherre.pgsql

1 files changed, 51 insertions, 0 deletions

diff --git a/src/include/postmaster/proctypelist.h b/src/include/postmaster/proctypelist.h
new file mode 100644
index 00000000000..242862451d8
--- /dev/null
+++ b/src/include/postmaster/proctypelist.h
@@ -0,0 +1,51 @@
+/*-------------------------------------------------------------------------
+ *
+ * proctypelist.h
+ *
+ * The list of process types is kept on its own source file for use by
+ * automatic tools.  The exact representation of a process type is
+ * determined by the PG_PROCTYPE macro, which is not defined in this
+ * file; it can be defined by the caller for special purposes.
+ *
+ * Portions Copyright (c) 1996-2025, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * IDENTIFICATION
+ *	  src/include/postmaster/proctypelist.h
+ *
+ *-------------------------------------------------------------------------
+ */
+
+/* there is deliberately not an #ifndef PROCTYPELIST_H here */
+
+/*
+ * WAL senders start their life as regular backend processes, and change their
+ * type after authenticating the client for replication.  We list it here for
+ * PostmasterChildName() but cannot launch them directly.
+ */
+
+/*
+ * List of process types (symbol, description, Main function, shmem_attach)
+ * entries.
+ */
+
+
+/* bktype, description, main_func, shmem_attach */
+PG_PROCTYPE(B_ARCHIVER, gettext_noop("archiver"), PgArchiverMain, true)
+PG_PROCTYPE(B_AUTOVAC_LAUNCHER, gettext_noop("autovacuum launcher"), AutoVacLauncherMain, true)
+PG_PROCTYPE(B_AUTOVAC_WORKER, gettext_noop("autovacuum worker"), AutoVacWorkerMain, true)
+PG_PROCTYPE(B_BACKEND, gettext_noop("client backend"), BackendMain, true)
+PG_PROCTYPE(B_BG_WORKER, gettext_noop("background worker"), BackgroundWorkerMain, true)
+PG_PROCTYPE(B_BG_WRITER, gettext_noop("background writer"), BackgroundWriterMain, true)
+PG_PROCTYPE(B_CHECKPOINTER, gettext_noop("checkpointer"), CheckpointerMain, true)
+PG_PROCTYPE(B_DEAD_END_BACKEND, gettext_noop("dead-end client backend"), BackendMain, true)
+PG_PROCTYPE(B_INVALID, gettext_noop("unrecognized"), NULL, false)
+PG_PROCTYPE(B_IO_WORKER, gettext_noop("io worker"), IoWorkerMain, true)
+PG_PROCTYPE(B_LOGGER, gettext_noop("syslogger"), SysLoggerMain, false)
+PG_PROCTYPE(B_SLOTSYNC_WORKER, gettext_noop("slotsync worker"), ReplSlotSyncWorkerMain, true)
+PG_PROCTYPE(B_STANDALONE_BACKEND, gettext_noop("standalone backend"), NULL, false)
+PG_PROCTYPE(B_STARTUP, gettext_noop("startup"), StartupProcessMain, true)
+PG_PROCTYPE(B_WAL_RECEIVER, gettext_noop("walreceiver"), WalReceiverMain, true)
+PG_PROCTYPE(B_WAL_SENDER, gettext_noop("walsender"), NULL, true)
+PG_PROCTYPE(B_WAL_SUMMARIZER, gettext_noop("walsummarizer"), WalSummarizerMain, true)
+PG_PROCTYPE(B_WAL_WRITER, gettext_noop("walwriter"), WalWriterMain, true)