Postgres-XC源码：Utilities for GTM standby global values

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come from ：Postgres-XC source code 1.04

* standby_utils.c
* Utilities for GTM standby global values

#include "gtm/gtm_c.h"#include "gtm/standby_utils.h"#include "gtm/gtm_lock.h"/* * Variables to interact with GTM active under GTM standby mode. */bool GTM_StandbyMode = false;char *GTM_ActiveAddress;int  GTM_ActivePort;/* For thread safety, values above are protected by a lock */static GTM_RWLock StandbyLock;boolRecovery_IsStandby(void){bool res;GTM_RWLockAcquire(&StandbyLock, GTM_LOCKMODE_READ);res = GTM_StandbyMode;GTM_RWLockRelease(&StandbyLock);return res;}voidRecovery_StandbySetStandby(bool standby){GTM_RWLockAcquire(&StandbyLock, GTM_LOCKMODE_WRITE);GTM_StandbyMode = standby;GTM_RWLockRelease(&StandbyLock);}voidRecovery_StandbySetConnInfo(const char *addr, int port){GTM_RWLockAcquire(&StandbyLock, GTM_LOCKMODE_WRITE);GTM_ActiveAddress = strdup(addr);GTM_ActivePort = port;GTM_RWLockRelease(&StandbyLock);}intRecovery_StandbyGetActivePort(void){int res;GTM_RWLockAcquire(&StandbyLock, GTM_LOCKMODE_READ);res = GTM_ActivePort;GTM_RWLockRelease(&StandbyLock);return res;}char *Recovery_StandbyGetActiveAddress(void){char *res;GTM_RWLockAcquire(&StandbyLock, GTM_LOCKMODE_READ);res = GTM_ActiveAddress;GTM_RWLockRelease(&StandbyLock);return res;}voidRecovery_InitStandbyLock(void){GTM_RWLockInit(&StandbyLock);}

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