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83 lines
2.6 KiB
C
83 lines
2.6 KiB
C
/* -*- mode: C; c-basic-offset: 4 -*- */
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// verify that cachetable prefetch of the same block multiple times only
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// fetches the block once.
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#ident "$Id$"
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#ident "Copyright (c) 2007-2011 Tokutek Inc. All rights reserved."
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#include "includes.h"
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#include "test.h"
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static int fetch_calls = 0;
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static int
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fetch (CACHEFILE f __attribute__((__unused__)),
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int UU(fd),
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CACHEKEY k __attribute__((__unused__)),
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u_int32_t fullhash __attribute__((__unused__)),
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void **value __attribute__((__unused__)),
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void** UU(dd),
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PAIR_ATTR *sizep __attribute__((__unused__)),
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int *dirtyp __attribute__((__unused__)),
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void *extraargs __attribute__((__unused__))
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) {
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fetch_calls++;
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sleep(10);
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*value = 0;
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*sizep = make_pair_attr(1);
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*dirtyp = 1;
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return 0;
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}
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static void cachetable_prefetch_maybegetandpin_test (void) {
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const int test_limit = 1;
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int r;
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CACHETABLE ct;
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r = toku_create_cachetable(&ct, test_limit, ZERO_LSN, NULL_LOGGER); assert(r == 0);
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char fname1[] = __SRCFILE__ "test1.dat";
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unlink(fname1);
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CACHEFILE f1;
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r = toku_cachetable_openf(&f1, ct, fname1, O_RDWR|O_CREAT, S_IRWXU|S_IRWXG|S_IRWXO); assert(r == 0);
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// prefetch block 0. this will take 10 seconds.
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CACHEKEY key = make_blocknum(0);
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u_int32_t fullhash = toku_cachetable_hash(f1, make_blocknum(0));
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CACHETABLE_WRITE_CALLBACK wc = def_write_callback(NULL);
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r = toku_cachefile_prefetch(f1, key, fullhash, wc, fetch, def_pf_req_callback, def_pf_callback, 0, NULL);
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toku_cachetable_verify(ct);
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// prefetch again. this should do nothing.
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r = toku_cachefile_prefetch(f1, key, fullhash, wc, fetch, def_pf_req_callback, def_pf_callback, 0, NULL);
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toku_cachetable_verify(ct);
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// verify that maybe_get_and_pin returns an error while the prefetch is in progress
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int i;
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for (i=1; i>=0; i++) {
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void *v;
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r = toku_cachetable_maybe_get_and_pin(f1, key, fullhash, &v);
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if (r == 0) break;
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toku_pthread_yield();
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}
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if (verbose) printf("%s:%d %d\n", __FUNCTION__, __LINE__, i);
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assert(i>1);
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toku_cachetable_verify(ct);
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// there should only be 1 fetch callback
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assert(fetch_calls == 1);
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r = toku_cachetable_unpin(f1, key, fullhash, CACHETABLE_CLEAN, make_pair_attr(1));
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assert(r == 0);
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toku_cachetable_verify(ct);
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r = toku_cachefile_close(&f1, 0, FALSE, ZERO_LSN); assert(r == 0);
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r = toku_cachetable_close(&ct); assert(r == 0 && ct == 0);
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}
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int
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test_main(int argc, const char *argv[]) {
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default_parse_args(argc, argv);
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cachetable_prefetch_maybegetandpin_test();
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return 0;
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}
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