michael@0: /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: /* A regression test for bug 794316 */
michael@0: 
michael@0: #include <stdio.h>
michael@0: #include <stdlib.h>
michael@0: 
michael@0: #include "prio.h"
michael@0: 
michael@0: static PRIOMethods dummyMethods;
michael@0: 
michael@0: int main()
michael@0: {
michael@0:     PRDescIdentity topId, middleId, bottomId;
michael@0:     PRFileDesc *top, *middle, *bottom;
michael@0:     PRFileDesc *fd;
michael@0: 
michael@0:     topId = PR_GetUniqueIdentity("top");
michael@0:     middleId = PR_GetUniqueIdentity("middle");
michael@0:     bottomId = PR_GetUniqueIdentity("bottom");
michael@0: 
michael@0:     top = PR_CreateIOLayerStub(topId, &dummyMethods);
michael@0:     middle = PR_CreateIOLayerStub(middleId, &dummyMethods);
michael@0:     bottom = PR_CreateIOLayerStub(bottomId, &dummyMethods);
michael@0: 
michael@0:     fd = bottom;
michael@0:     PR_PushIOLayer(fd, PR_TOP_IO_LAYER, middle);
michael@0:     PR_PushIOLayer(fd, PR_TOP_IO_LAYER, top);
michael@0: 
michael@0:     top = fd;
michael@0:     middle = top->lower;
michael@0:     bottom = middle->lower;
michael@0: 
michael@0:     /* Verify that the higher pointers are correct. */
michael@0:     if (middle->higher != top) {
michael@0:         fprintf(stderr, "middle->higher is wrong\n");
michael@0:         fprintf(stderr, "FAILED\n");
michael@0:         exit(1);
michael@0:     }
michael@0:     if (bottom->higher != middle) {
michael@0:         fprintf(stderr, "bottom->higher is wrong\n");
michael@0:         fprintf(stderr, "FAILED\n");
michael@0:         exit(1);
michael@0:     }
michael@0: 
michael@0:     top = PR_PopIOLayer(fd, topId);
michael@0:     top->dtor(top);
michael@0: 
michael@0:     middle = fd;
michael@0:     bottom = middle->lower;
michael@0: 
michael@0:     /* Verify that the higher pointer is correct. */
michael@0:     if (bottom->higher != middle) {
michael@0:         fprintf(stderr, "bottom->higher is wrong\n");
michael@0:         fprintf(stderr, "FAILED\n");
michael@0:         exit(1);
michael@0:     }
michael@0: 
michael@0:     middle = PR_PopIOLayer(fd, middleId);
michael@0:     middle->dtor(middle);
michael@0:     if (fd->identity != bottomId) {
michael@0:         fprintf(stderr, "The bottom layer has the wrong identity\n");
michael@0:         fprintf(stderr, "FAILED\n");
michael@0:         exit(1);
michael@0:     }
michael@0:     fd->dtor(fd);
michael@0: 
michael@0:     printf("PASS\n");
michael@0:     return 0;
michael@0: }