test_dsa.c File Reference

#include "postgres.h"
#include "fmgr.h"
#include "storage/lwlock.h"
#include "utils/dsa.h"
#include "utils/resowner.h"

Include dependency graph for test_dsa.c:

Go to the source code of this file.

Functions
	PG_FUNCTION_INFO_V1 (test_dsa_basic)
Datum	test_dsa_basic (PG_FUNCTION_ARGS)
	PG_FUNCTION_INFO_V1 (test_dsa_resowners)
Datum	test_dsa_resowners (PG_FUNCTION_ARGS)

Variables
	PG_MODULE_MAGIC

Function Documentation

PG_FUNCTION_INFO_V1() [1/2]

PG_FUNCTION_INFO_V1

(

test_dsa_basic

)

PG_FUNCTION_INFO_V1() [2/2]

PG_FUNCTION_INFO_V1

(

test_dsa_resowners

)

test_dsa_basic()

Datum test_dsa_basic

(

PG_FUNCTION_ARGS

)

Definition at line 25 of file test_dsa.c.

{
    int         tranche_id;
    dsa_area   *a;
    dsa_pointer p[100];
 
    /* XXX: this tranche is leaked */
    tranche_id = LWLockNewTrancheId("test_dsa");
 
    a = dsa_create(tranche_id);
    for (int i = 0; i < 100; i++)
    {
        p[i] = dsa_allocate(a, 1000);
        snprintf(dsa_get_address(a, p[i]), 1000, "foobar%d", i);
    }
 
    for (int i = 0; i < 100; i++)
    {
        char        buf[100];
 
        snprintf(buf, 100, "foobar%d", i);
        if (strcmp(dsa_get_address(a, p[i]), buf) != 0)
            elog(ERROR, "no match");
    }
 
    for (int i = 0; i < 100; i++)
    {
        dsa_free(a, p[i]);
    }
 
    dsa_detach(a);
 
    PG_RETURN_VOID();
}

References a, buf, dsa_allocate, dsa_create, dsa_detach(), dsa_free(), dsa_get_address(), elog, ERROR, i, LWLockNewTrancheId(), PG_RETURN_VOID, and snprintf.

test_dsa_resowners()

Datum test_dsa_resowners

(

PG_FUNCTION_ARGS

)

Definition at line 63 of file test_dsa.c.

{
    int         tranche_id;
    dsa_area   *a;
    dsa_pointer p[10000];
    ResourceOwner oldowner;
    ResourceOwner childowner;
 
    /* XXX: this tranche is leaked */
    tranche_id = LWLockNewTrancheId("test_dsa");
 
    /* Create DSA in parent resource owner */
    a = dsa_create(tranche_id);
 
    /*
     * Switch to child resource owner, and do a bunch of allocations in the
     * DSA
     */
    oldowner = CurrentResourceOwner;
    childowner = ResourceOwnerCreate(oldowner, "test_dsa temp owner");
    CurrentResourceOwner = childowner;
 
    for (int i = 0; i < 10000; i++)
    {
        p[i] = dsa_allocate(a, 1000);
        snprintf(dsa_get_address(a, p[i]), 1000, "foobar%d", i);
    }
 
    /* Also test freeing, by freeing some of the allocations. */
    for (int i = 0; i < 500; i++)
        dsa_free(a, p[i]);
 
    /* Release the child resource owner */
    CurrentResourceOwner = oldowner;
    ResourceOwnerRelease(childowner,
                         RESOURCE_RELEASE_BEFORE_LOCKS,
                         true, false);
    ResourceOwnerRelease(childowner,
                         RESOURCE_RELEASE_LOCKS,
                         true, false);
    ResourceOwnerRelease(childowner,
                         RESOURCE_RELEASE_AFTER_LOCKS,
                         true, false);
    ResourceOwnerDelete(childowner);
 
    dsa_detach(a);
 
    PG_RETURN_VOID();
}

References a, CurrentResourceOwner, dsa_allocate, dsa_create, dsa_detach(), dsa_free(), dsa_get_address(), i, LWLockNewTrancheId(), PG_RETURN_VOID, RESOURCE_RELEASE_AFTER_LOCKS, RESOURCE_RELEASE_BEFORE_LOCKS, RESOURCE_RELEASE_LOCKS, ResourceOwnerCreate(), ResourceOwnerDelete(), ResourceOwnerRelease(), and snprintf.

Variable Documentation

PG_MODULE_MAGIC

PG_MODULE_MAGIC

Definition at line 20 of file test_dsa.c.