Completely rewrote the test.

nsprpub/pr/tests/pipeself.c

@@ -20,79 +20,143 @@
  * File: pipeself.c
  *
  * Description:
- * This test creates a pipe, writes to it, and reads from it.
+ * This test has two threads communicating with each other using
+ * two unidirectional pipes.  The primordial thread is the ping
+ * thread and the other thread is the pong thread.  The ping
+ * thread writes "ping" to the pong thread and the pong thread
+ * writes "pong" back.
  */
 
 #include "prio.h"
 #include "prerror.h"
+#include "prthread.h"
 
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 
 #define NUM_ITERATIONS 10
 
-#define ENGLISH_GREETING "Hello"
-#define SPANISH_GREETING "Hola"
+static PRFileDesc *ping_in, *ping_out;
+static PRFileDesc *pong_in, *pong_out;
+
+static void PongThreadFunc(void *arg)
+{
+    char buf[1024];
+    int idx;
+    PRInt32 nBytes;
+    PRStatus status;
+
+    for (idx = 0; idx < NUM_ITERATIONS; idx++) {
+        memset(buf, 0, sizeof(buf));
+        nBytes = PR_Read(pong_in, buf, sizeof(buf));
+        if (nBytes == -1) {
+            fprintf(stderr, "PR_Read failed\n");
+            exit(1);
+        }
+        printf("pong thread: received \"%s\"\n", buf);
+        if (nBytes != 5) {
+            fprintf(stderr, "pong thread: expected 5 bytes but got %d bytes\n",
+                    nBytes);
+            exit(1);
+        }
+        if (strcmp(buf, "ping") != 0) {
+            fprintf(stderr, "pong thread: expected \"ping\" but got \"%s\"\n",
+                    buf);
+            exit(1);
+        }
+        strcpy(buf, "pong");
+        printf("pong thread: sending \"%s\"\n", buf);
+        nBytes = PR_Write(pong_out, buf, 5);
+        if (nBytes == -1) {
+            fprintf(stderr, "PR_Write failed: (%d, %d)\n", PR_GetError(),
+                    PR_GetOSError());
+            exit(1);
+        }
+    }
+
+    status = PR_Close(pong_in);
+    if (status == PR_FAILURE) {
+        fprintf(stderr, "PR_Close failed\n");
+        exit(1);
+    }
+    status = PR_Close(pong_out);
+    if (status == PR_FAILURE) {
+        fprintf(stderr, "PR_Close failed\n");
+        exit(1);
+    }
+}
 
 int main()
 {
-    PRFileDesc *readPipe, *writePipe;
-    char buf[128];
-    int len;
+    PRStatus status;
+    PRThread *pongThread;
+    char buf[1024];
+    PRInt32 nBytes;
     int idx;
 
-    if (PR_CreatePipe(&readPipe, &writePipe) == PR_FAILURE) {
-        fprintf(stderr, "cannot create pipe: (%d, %d)\n",
-                PR_GetError(), PR_GetOSError());
-        return 1;
+    status = PR_CreatePipe(&ping_in, &pong_out);
+    if (status == PR_FAILURE) {
+        fprintf(stderr, "PR_CreatePipe failed\n");
+        exit(1);
+    }
+    status = PR_CreatePipe(&pong_in, &ping_out);
+    if (status == PR_FAILURE) {
+        fprintf(stderr, "PR_CreatePipe failed\n");
+        exit(1);
+    }
+
+    pongThread = PR_CreateThread(PR_USER_THREAD, PongThreadFunc, NULL,
+            PR_PRIORITY_NORMAL, PR_GLOBAL_THREAD, PR_JOINABLE_THREAD, 0);
+    if (pongThread == NULL) {
+        fprintf(stderr, "PR_CreateThread failed\n");
+        exit(1);
     }
 
     for (idx = 0; idx < NUM_ITERATIONS; idx++) {
-        strcpy(buf, ENGLISH_GREETING);
-        len = strlen(buf) + 1;
-        if (PR_Write(writePipe, buf, len) < len) {
-            fprintf(stderr, "write failed\n");
-            return 1;
+        strcpy(buf, "ping");
+        printf("ping thread: sending \"%s\"\n", buf);
+        nBytes = PR_Write(ping_out, buf, 5);
+        if (nBytes == -1) {
+            fprintf(stderr, "PR_Write failed: (%d, %d)\n", PR_GetError(),
+                    PR_GetOSError());
+            exit(1);
         }
         memset(buf, 0, sizeof(buf));
-        if (PR_Read(readPipe, buf, sizeof(buf)) == -1) {
-            fprintf(stderr, "read failed: (%d, %d)\n",
-                    PR_GetError(), PR_GetOSError());
-            return 1;
+        nBytes = PR_Read(ping_in, buf, sizeof(buf));
+        if (nBytes == -1) {
+            fprintf(stderr, "PR_Read failed\n");
+            exit(1);
         }
-        if (strcmp(buf, ENGLISH_GREETING) != 0) {
-            fprintf(stderr, "expected \"%s\" but got \"%s\"\n",
-                    ENGLISH_GREETING, buf);
-            return 1;
+        printf("ping thread: received \"%s\"\n", buf);
+        if (nBytes != 5) {
+            fprintf(stderr, "ping thread: expected 5 bytes but got %d bytes\n",
+                    nBytes);
+            exit(1);
         }
-
-        strcpy(buf, SPANISH_GREETING);
-        len = strlen(buf) + 1;
-        if (PR_Write(writePipe, buf, len) < len) {
-            fprintf(stderr, "write failed\n");
-            return 1;
-        }
-        memset(buf, 0, sizeof(buf));
-        if (PR_Read(readPipe, buf, sizeof(buf)) == -1) {
-            fprintf(stderr, "read failed: (%d, %d)\n",
-                    PR_GetError(), PR_GetOSError());
-            return 1;
-        }
-        if (strcmp(buf, SPANISH_GREETING) != 0) {
-            fprintf(stderr, "expected \"%s\" but got \"%s\"\n",
-                    SPANISH_GREETING, buf);
-            return 1;
+        if (strcmp(buf, "pong") != 0) {
+            fprintf(stderr, "ping thread: expected \"pong\" but got \"%s\"\n",
+                    buf);
+            exit(1);
         }
     }
 
-    if (PR_Close(readPipe) == PR_FAILURE) {
-        fprintf(stderr, "close failed\n");
-        return 1;
+    status = PR_Close(ping_in);
+    if (status == PR_FAILURE) {
+        fprintf(stderr, "PR_Close failed\n");
+        exit(1);
     }
-    if (PR_Close(writePipe) == PR_FAILURE) {
-        fprintf(stderr, "close failed\n");
-        return 1;
+    status = PR_Close(ping_out);
+    if (status == PR_FAILURE) {
+        fprintf(stderr, "PR_Close failed\n");
+        exit(1);
     }
+    status = PR_JoinThread(pongThread);
+    if (status == PR_FAILURE) {
+        fprintf(stderr, "PR_JoinThread failed\n");
+        exit(1);
+    }
+
     printf("PASS\n");
     return 0;
 }