journal: add missing test file

.gitignore

@@ -1,3 +1,4 @@
+/test-mmap-cache
 /test-unit-file
 /test-log
 /test-journal-verify

src/journal/test-mmap-cache.c

@@ -0,0 +1,79 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2012 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <stdlib.h>
+#include <sys/mman.h>
+#include <unistd.h>
+
+#include "log.h"
+#include "macro.h"
+#include "util.h"
+#include "mmap-cache.h"
+
+int main(int argc, char *argv[]) {
+        int x, y, z, r;
+        char px[] = "/tmp/testmmapXXXXXXX", py[] = "/tmp/testmmapYXXXXXX", pz[] = "/tmp/testmmapZXXXXXX";
+        MMapCache *m;
+        void *p, *q;
+
+        assert_se(m = mmap_cache_new());
+
+        x = mkstemp(px);
+        assert(x >= 0);
+        unlink(px);
+
+        y = mkstemp(py);
+        assert(y >= 0);
+        unlink(py);
+
+        z = mkstemp(pz);
+        assert(z >= 0);
+        unlink(pz);
+
+        r = mmap_cache_get(m, x, PROT_READ, 0, false, 1, 2, NULL, &p);
+        assert(r >= 0);
+
+        r = mmap_cache_get(m, x, PROT_READ, 0, false, 2, 2, NULL, &q);
+        assert(r >= 0);
+
+        assert((uint8_t*) p + 1 == (uint8_t*) q);
+
+        r = mmap_cache_get(m, x, PROT_READ, 1, false, 3, 2, NULL, &q);
+        assert(r >= 0);
+
+        assert((uint8_t*) p + 2 == (uint8_t*) q);
+
+        r = mmap_cache_get(m, x, PROT_READ, 0, false, 16ULL*1024ULL*1024ULL, 2, NULL, &p);
+        assert(r >= 0);
+
+        r = mmap_cache_get(m, x, PROT_READ, 1, false, 16ULL*1024ULL*1024ULL+1, 2, NULL, &q);
+        assert(r >= 0);
+
+        assert((uint8_t*) p + 1 == (uint8_t*) q);
+
+        mmap_cache_unref(m);
+
+        close_nointr_nofail(x);
+        close_nointr_nofail(y);
+        close_nointr_nofail(z);
+
+        return 0;
+}