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Change ProcSendSignal() to take pgprocno.

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Instead of referring to target backends by pid, use pgprocno.  This
means that we don't have to scan the ProcArray and we can drop some
special case code for dealing with the startup process.

Discussion: https://postgr.es/m/CA%2BhUKGLYRyDaneEwz5Uya_OgFLMx5BgJfkQSD%3Dq9HmwsfRRb-w%40mail.gmail.com
Reviewed-by: Soumyadeep Chakraborty <soumyadeep2007@gmail.com>
Reviewed-by: Ashwin Agrawal <ashwinstar@gmail.com>
Reviewed-by: Andres Freund <andres@anarazel.de>
This commit is contained in:
Thomas Munro
2021-12-16 12:40:15 +13:00
parent bbc227e951
commit a13db0e164
8 changed files with 23 additions and 64 deletions
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6
src/include/storage/proc.h
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@@ -359,9 +359,6 @@ typedef struct PROC_HDR
Latch *checkpointerLatch;
/* Current shared estimate of appropriate spins_per_delay value */
int spins_per_delay;
/* The proc of the Startup process, since not in ProcArray */
PGPROC *startupProc;
int startupProcPid;
/* Buffer id of the buffer that Startup process waits for pin on, or -1 */
int startupBufferPinWaitBufId;
} PROC_HDR;
@@ -402,7 +399,6 @@ extern void InitProcess(void);
extern void InitProcessPhase2(void);
extern void InitAuxiliaryProcess(void);
extern void PublishStartupProcessInformation(void);
extern void SetStartupBufferPinWaitBufId(int bufid);
extern int GetStartupBufferPinWaitBufId(void);
@@ -418,7 +414,7 @@ extern bool IsWaitingForLock(void);
extern void LockErrorCleanup(void);
extern void ProcWaitForSignal(uint32 wait_event_info);
extern void ProcSendSignal(int pid);
extern void ProcSendSignal(int pgprocno);
extern PGPROC *AuxiliaryPidGetProc(int pid);