sharedfileset.h File Reference

#include "storage/dsm.h"
#include "storage/fd.h"
#include "storage/fileset.h"
#include "storage/spin.h"

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Data Structures
struct	SharedFileSet

Typedefs
typedef struct SharedFileSet	SharedFileSet

Functions
void	SharedFileSetInit (SharedFileSet *fileset, dsm_segment *seg)
void	SharedFileSetAttach (SharedFileSet *fileset, dsm_segment *seg)
void	SharedFileSetDeleteAll (SharedFileSet *fileset)

Typedef Documentation

SharedFileSet

typedef struct SharedFileSet SharedFileSet

Function Documentation

SharedFileSetAttach()

void SharedFileSetAttach	(	SharedFileSet *	fileset,
		dsm_segment *	seg
	)

Definition at line 62 of file sharedfileset.c.

References ereport, errcode(), errmsg(), ERROR, SharedFileSet::mutex, on_dsm_detach(), PointerGetDatum, SharedFileSet::refcnt, SharedFileSetOnDetach(), SpinLockAcquire, SpinLockRelease, and success.

Referenced by ExecHashJoinInitializeWorker(), and tuplesort_attach_shared().

{
    bool        success;

    SpinLockAcquire(&fileset->mutex);
    if (fileset->refcnt == 0)
        success = false;
    else
    {
        ++fileset->refcnt;
        success = true;
    }
    SpinLockRelease(&fileset->mutex);

    if (!success)
        ereport(ERROR,
                (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
                 errmsg("could not attach to a SharedFileSet that is already destroyed")));

    /* Register our cleanup callback. */
    on_dsm_detach(seg, SharedFileSetOnDetach, PointerGetDatum(fileset));
}

SharedFileSetDeleteAll()

void SharedFileSetDeleteAll

(

SharedFileSet *

fileset

)

Definition at line 89 of file sharedfileset.c.

References FileSetDeleteAll(), and SharedFileSet::fs.

Referenced by ExecHashJoinReInitializeDSM().

{
    FileSetDeleteAll(&fileset->fs);
}

SharedFileSetInit()

void SharedFileSetInit	(	SharedFileSet *	fileset,
		dsm_segment *	seg
	)

Definition at line 44 of file sharedfileset.c.

References FileSetInit(), SharedFileSet::fs, SharedFileSet::mutex, on_dsm_detach(), PointerGetDatum, SharedFileSet::refcnt, SharedFileSetOnDetach(), and SpinLockInit.

Referenced by ExecHashJoinInitializeDSM(), and tuplesort_initialize_shared().

{
    /* Initialize the shared fileset specific members. */
    SpinLockInit(&fileset->mutex);
    fileset->refcnt = 1;

    /* Initialize the fileset. */
    FileSetInit(&fileset->fs);

    /* Register our cleanup callback. */
    if (seg)
        on_dsm_detach(seg, SharedFileSetOnDetach, PointerGetDatum(fileset));
}