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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2009-07-31 20:26:23 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2009-07-31 20:26:23 +0000 |
| commit | 2487d872e025312e7c16f0dd772190c6787efeea (patch) | |
| tree | 32a3788fd497c755d9d8683c1ea5fa9f354f73f1 /src/backend/storage/ipc/ipci.c | |
| parent | a23c6415787bd1aa8f1c44446d689a874a78afea (diff) | |
| download | postgresql-2487d872e025312e7c16f0dd772190c6787efeea.tar.gz | |
Create a multiplexing structure for signals to Postgres child processes.
This patch gets us out from under the Unix limitation of two user-defined
signal types. We already had done something similar for signals directed to
the postmaster process; this adds multiplexing for signals directed to
backends and auxiliary processes (so long as they're connected to shared
memory).
As proof of concept, replace the former usage of SIGUSR1 and SIGUSR2
for backends with use of the multiplexing mechanism. There are still some
hard-wired definitions of SIGUSR1 and SIGUSR2 for other process types,
but getting rid of those doesn't seem interesting at the moment.
Fujii Masao
Diffstat (limited to 'src/backend/storage/ipc/ipci.c')
| -rw-r--r-- | src/backend/storage/ipc/ipci.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/backend/storage/ipc/ipci.c b/src/backend/storage/ipc/ipci.c index 281215d218..bd4f168bfb 100644 --- a/src/backend/storage/ipc/ipci.c +++ b/src/backend/storage/ipc/ipci.c @@ -8,7 +8,7 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/storage/ipc/ipci.c,v 1.100 2009/05/05 19:59:00 tgl Exp $ + * $PostgreSQL: pgsql/src/backend/storage/ipc/ipci.c,v 1.101 2009/07/31 20:26:23 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -30,6 +30,7 @@ #include "storage/pg_shmem.h" #include "storage/pmsignal.h" #include "storage/procarray.h" +#include "storage/procsignal.h" #include "storage/sinvaladt.h" #include "storage/spin.h" @@ -112,6 +113,7 @@ CreateSharedMemoryAndSemaphores(bool makePrivate, int port) size = add_size(size, BackendStatusShmemSize()); size = add_size(size, SInvalShmemSize()); size = add_size(size, PMSignalShmemSize()); + size = add_size(size, ProcSignalShmemSize()); size = add_size(size, BgWriterShmemSize()); size = add_size(size, AutoVacuumShmemSize()); size = add_size(size, BTreeShmemSize()); @@ -208,6 +210,7 @@ CreateSharedMemoryAndSemaphores(bool makePrivate, int port) * Set up interprocess signaling mechanisms */ PMSignalShmemInit(); + ProcSignalShmemInit(); BgWriterShmemInit(); AutoVacuumShmemInit(); |