/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/*
** File: nameshm1.c -- Test Named Shared Memory
**
** Description:
** nameshm1 tests Named Shared Memory. nameshm1 performs two tests of
** named shared memory.
**
** The first test is a basic test. The basic test operates as a single
** process. The process exercises all the API elements of the facility.
** This test also attempts to write to all locations in the shared
** memory.
**
** The second test is a client-server test. The client-server test
** creates a new instance of nameshm1, passing the -C argument to the
** new process; this creates the client-side process. The server-side
** (the instance of nameshm1 created from the command line) and the
** client-side interact via inter-process semaphores to verify that the
** shared memory segment can be read and written by both sides in a
** synchronized maner.
**
** Note: Because this test runs in two processes, the log files created
** by the test are not in chronological sequence; makes it hard to read.
** As a temporary circumvention, I changed the definition(s) of the
** _PUT_LOG() macro in prlog.c to force a flushall(), or equivalent.
** This causes the log entries to be emitted in true chronological
** order.
**
** Synopsis: nameshm1 [options] [name]
**
** Options:
** -d       Enables debug trace via PR_LOG()
** -v       Enables verbose mode debug trace via PR_LOG()
** -w       Causes the basic test to attempt to write to the segment
**          mapped as read-only. When this option is specified, the
**          test should crash with a seg-fault; this is a destructive
**          test and is considered successful when it seg-faults.
**
** -C       Causes nameshm1 to start as the client-side of a
**          client-server pair of processes. Only the instance
**          of nameshm1 operating as the server-side process should
**          specify the -C option when creating the client-side process;
**          the -C option should not be specified at the command line.
**          The client-side uses the shared memory segment created by
**          the server-side to communicate with the server-side
**          process.
**
** -p <n>   Specify the number of iterations the client-server tests
**          should perform. Default: 1000.
**
** -s <n>   Size, in KBytes (1024), of the shared memory segment.
**          Default: (10 * 1024)
**
** -i <n>   Number of client-side iterations. Default: 3
**
** name     specifies the name of the shared memory segment to be used.
**          Default: /tmp/xxxNSPRshm
**
**
** See also: prshm.h
**
** /lth. Aug-1999.
*/

#include <plgetopt.h>
#include <nspr.h>
#include <stdlib.h>
#include <string.h>
#include <private/primpl.h>

#ifdef DEBUG
#  define SEM_D "D"
#else
#  define SEM_D
#endif
#ifdef IS_64
#  define SEM_64 "64"
#else
#  define SEM_64
#endif

#define SEM_NAME1 "/tmp/nameshmSEM1" SEM_D SEM_64
#define SEM_NAME2 "/tmp/nameshmSEM2" SEM_D SEM_64
#define OPT_NAME "/tmp/xxxNSPRshm" SEM_D SEM_64
#define EXE_NAME "nameshm1"
#define SEM_MODE 0666
#define SHM_MODE 0666

#define NameSize (1024)

PRIntn debug = 0;
PRIntn failed_already = 0;
PRLogModuleLevel msgLevel = PR_LOG_NONE;
PRLogModuleInfo* lm;

/* command line options */
PRIntn optDebug = 0;
PRIntn optVerbose = 0;
PRUint32 optWriteRO = 0; /* test write to read-only memory. should crash  */
PRUint32 optClient = 0;
PRUint32 optCreate = 1;
PRUint32 optAttachRW = 1;
PRUint32 optAttachRO = 1;
PRUint32 optClose = 1;
PRUint32 optDelete = 1;
PRInt32 optPing = 1000;
PRUint32 optSize = (10 * 1024);
PRInt32 optClientIterations = 3;
char optName[NameSize] = OPT_NAME;

char buf[1024] = "";

static void BasicTest(void) {
  PRSharedMemory* shm;
  char* addr; /* address of shared memory segment */
  PRUint32 i;
  PRInt32 rc;

  PR_LOG(lm, msgLevel, ("nameshm1: Begin BasicTest"));

  if (PR_FAILURE == PR_DeleteSharedMemory(optName)) {
    PR_LOG(lm, msgLevel,
           ("nameshm1: Initial PR_DeleteSharedMemory() failed. No problem"));
  } else
    PR_LOG(lm, msgLevel, ("nameshm1: Initial PR_DeleteSharedMemory() success"));

  shm = PR_OpenSharedMemory(optName, optSize, (PR_SHM_CREATE | PR_SHM_EXCL),
                            SHM_MODE);
  if (NULL == shm) {
    PR_LOG(lm, msgLevel,
           ("nameshm1: RW Create: Error: %ld. OSError: %ld", PR_GetError(),
            PR_GetOSError()));
    failed_already = 1;
    return;
  }
  PR_LOG(lm, msgLevel, ("nameshm1: RW Create: success: %p", shm));

  addr = PR_AttachSharedMemory(shm, 0);
  if (NULL == addr) {
    PR_LOG(lm, msgLevel,
           ("nameshm1: RW Attach: Error: %ld. OSError: %ld", PR_GetError(),
            PR_GetOSError()));
    failed_already = 1;
    return;
  }
  PR_LOG(lm, msgLevel, ("nameshm1: RW Attach: success: %p", addr));

  /* fill memory with i */
  for (i = 0; i < optSize; i++) {
    *(addr + i) = i;
  }

  rc = PR_DetachSharedMemory(shm, addr);
  if (PR_FAILURE == rc) {
    PR_LOG(lm, msgLevel,
           ("nameshm1: RW Detach: Error: %ld. OSError: %ld", PR_GetError(),
            PR_GetOSError()));
    failed_already = 1;
    return;
  }
  PR_LOG(lm, msgLevel, ("nameshm1: RW Detach: success: "));

  rc = PR_CloseSharedMemory(shm);
  if (PR_FAILURE == rc) {
    PR_LOG(lm, msgLevel,
           ("nameshm1: RW Close: Error: %ld. OSError: %ld", PR_GetError(),
            PR_GetOSError()));
    failed_already = 1;
    return;
  }
  PR_LOG(lm, msgLevel, ("nameshm1: RW Close: success: "));

  rc = PR_DeleteSharedMemory(optName);
  if (PR_FAILURE == rc) {
    PR_LOG(lm, msgLevel,
           ("nameshm1: RW Delete: Error: %ld. OSError: %ld", PR_GetError(),
            PR_GetOSError()));
    failed_already = 1;
    return;
  }
  PR_LOG(lm, msgLevel, ("nameshm1: RW Delete: success: "));

  PR_LOG(lm, msgLevel, ("nameshm1: BasicTest(): Passed"));

  return;
} /* end BasicTest() */

static void ReadOnlyTest(void) {
  PRSharedMemory* shm;
  char* roAddr; /* read-only address of shared memory segment */
  PRInt32 rc;

  PR_LOG(lm, msgLevel, ("nameshm1: Begin ReadOnlyTest"));

  shm = PR_OpenSharedMemory(optName, optSize, (PR_SHM_CREATE | PR_SHM_EXCL),
                            SHM_MODE);
  if (NULL == shm) {
    PR_LOG(lm, msgLevel,
           ("nameshm1: RO Create: Error: %ld. OSError: %ld", PR_GetError(),
            PR_GetOSError()));
    failed_already = 1;
    return;
  }
  PR_LOG(lm, msgLevel, ("nameshm1: RO Create: success: %p", shm));

  roAddr = PR_AttachSharedMemory(shm, PR_SHM_READONLY);
  if (NULL == roAddr) {
    PR_LOG(lm, msgLevel,
           ("nameshm1: RO Attach: Error: %ld. OSError: %ld", PR_GetError(),
            PR_GetOSError()));
    failed_already = 1;
    return;
  }
  PR_LOG(lm, msgLevel, ("nameshm1: RO Attach: success: %p", roAddr));

  if (optWriteRO) {
    *roAddr = 0x00; /* write to read-only memory */
    failed_already = 1;
    PR_LOG(lm, msgLevel, ("nameshm1: Wrote to read-only memory segment!"));
    return;
  }

  rc = PR_DetachSharedMemory(shm, roAddr);
  if (PR_FAILURE == rc) {
    PR_LOG(lm, msgLevel,
           ("nameshm1: RO Detach: Error: %ld. OSError: %ld", PR_GetError(),
            PR_GetOSError()));
    failed_already = 1;
    return;
  }
  PR_LOG(lm, msgLevel, ("nameshm1: RO Detach: success: "));

  rc = PR_CloseSharedMemory(shm);
  if (PR_FAILURE == rc) {
    PR_LOG(lm, msgLevel,
           ("nameshm1: RO Close: Error: %ld. OSError: %ld", PR_GetError(),
            PR_GetOSError()));
    failed_already = 1;
    return;
  }
  PR_LOG(lm, msgLevel, ("nameshm1: RO Close: success: "));

  rc = PR_DeleteSharedMemory(optName);
  if (PR_FAILURE == rc) {
    PR_LOG(lm, msgLevel,
           ("nameshm1: RO Destroy: Error: %ld. OSError: %ld", PR_GetError(),
            PR_GetOSError()));
    failed_already = 1;
    return;
  }
  PR_LOG(lm, msgLevel, ("nameshm1: RO Destroy: success: "));

  PR_LOG(lm, msgLevel, ("nameshm1: ReadOnlyTest(): Passed"));

  return;
} /* end ReadOnlyTest() */

static void DoClient(void) {
  PRStatus rc;
  PRSem *sem1, *sem2;
  PRSharedMemory* shm;
  PRUint32* addr;
  PRInt32 i;

  PR_LOG(lm, msgLevel, ("nameshm1: DoClient(): Starting"));

  sem1 = PR_OpenSemaphore(SEM_NAME1, 0, 0, 0);
  PR_ASSERT(sem1);

  sem2 = PR_OpenSemaphore(SEM_NAME2, 0, 0, 0);
  PR_ASSERT(sem1);

  shm = PR_OpenSharedMemory(optName, optSize, 0, SHM_MODE);
  if (NULL == shm) {
    PR_LOG(lm, msgLevel,
           ("nameshm1: DoClient(): Create: Error: %ld. OSError: %ld",
            PR_GetError(), PR_GetOSError()));
    failed_already = 1;
    return;
  }
  PR_LOG(lm, msgLevel, ("nameshm1: DoClient(): Create: success: %p", shm));

  addr = PR_AttachSharedMemory(shm, 0);
  if (NULL == addr) {
    PR_LOG(lm, msgLevel,
           ("nameshm1: DoClient(): Attach: Error: %ld. OSError: %ld",
            PR_GetError(), PR_GetOSError()));
    failed_already = 1;
    return;
  }
  PR_LOG(lm, msgLevel, ("nameshm1: DoClient(): Attach: success: %p", addr));

  PR_LOG(lm, msgLevel, ("Client found: %s", addr));

  PR_Sleep(PR_SecondsToInterval(4));
  for (i = 0; i < optPing; i++) {
    rc = PR_WaitSemaphore(sem2);
    PR_ASSERT(PR_FAILURE != rc);

    (*addr)++;
    PR_ASSERT((*addr % 2) == 0);
    if (optVerbose)
      PR_LOG(lm, msgLevel, ("nameshm1: Client ping: %d, i: %d", *addr, i));

    rc = PR_PostSemaphore(sem1);
    PR_ASSERT(PR_FAILURE != rc);
  }

  rc = PR_CloseSemaphore(sem1);
  PR_ASSERT(PR_FAILURE != rc);

  rc = PR_CloseSemaphore(sem2);
  PR_ASSERT(PR_FAILURE != rc);

  rc = PR_DetachSharedMemory(shm, addr);
  if (PR_FAILURE == rc) {
    PR_LOG(lm, msgLevel,
           ("nameshm1: DoClient(): Detach: Error: %ld. OSError: %ld",
            PR_GetError(), PR_GetOSError()));
    failed_already = 1;
    return;
  }
  PR_LOG(lm, msgLevel, ("nameshm1: DoClient(): Detach: success: "));

  rc = PR_CloseSharedMemory(shm);
  if (PR_FAILURE == rc) {
    PR_LOG(lm, msgLevel,
           ("nameshm1: DoClient(): Close: Error: %ld. OSError: %ld",
            PR_GetError(), PR_GetOSError()));
    failed_already = 1;
    return;
  }
  PR_LOG(lm, msgLevel, ("nameshm1: DoClient(): Close: success: "));

  return;
} /* end DoClient() */

static void ClientServerTest(void) {
  PRStatus rc;
  PRSem *sem1, *sem2;
  PRProcess* proc;
  PRInt32 exit_status;
  PRSharedMemory* shm;
  PRUint32* addr;
  PRInt32 i;
  char* child_argv[8];
  char buf[24];

  PR_LOG(lm, msgLevel, ("nameshm1: Begin ClientServerTest"));

  rc = PR_DeleteSharedMemory(optName);
  if (PR_FAILURE == rc) {
    PR_LOG(lm, msgLevel, ("nameshm1: Server: Destroy: failed. No problem"));
  } else
    PR_LOG(lm, msgLevel, ("nameshm1: Server: Destroy: success"));

  shm = PR_OpenSharedMemory(optName, optSize, (PR_SHM_CREATE | PR_SHM_EXCL),
                            SHM_MODE);
  if (NULL == shm) {
    PR_LOG(lm, msgLevel,
           ("nameshm1: Server: Create: Error: %ld. OSError: %ld", PR_GetError(),
            PR_GetOSError()));
    failed_already = 1;
    return;
  }
  PR_LOG(lm, msgLevel, ("nameshm1: Server: Create: success: %p", shm));

  addr = PR_AttachSharedMemory(shm, 0);
  if (NULL == addr) {
    PR_LOG(lm, msgLevel,
           ("nameshm1: Server: Attach: Error: %ld. OSError: %ld", PR_GetError(),
            PR_GetOSError()));
    failed_already = 1;
    return;
  }
  PR_LOG(lm, msgLevel, ("nameshm1: Server: Attach: success: %p", addr));

  sem1 = PR_OpenSemaphore(SEM_NAME1, PR_SEM_CREATE, SEM_MODE, 0);
  PR_ASSERT(sem1);

  sem2 = PR_OpenSemaphore(SEM_NAME2, PR_SEM_CREATE, SEM_MODE, 1);
  PR_ASSERT(sem1);

  strcpy((char*)addr, "FooBar");

  child_argv[0] = EXE_NAME;
  child_argv[1] = "-C";
  child_argv[2] = "-p";
  sprintf(buf, "%d", optPing);
  child_argv[3] = buf;
  child_argv[4] = optName;
  child_argv[5] = NULL;

  proc = PR_CreateProcess(child_argv[0], child_argv, NULL, NULL);
  PR_ASSERT(proc);

  PR_Sleep(PR_SecondsToInterval(4));

  *addr = 1;
  for (i = 0; i < optPing; i++) {
    rc = PR_WaitSemaphore(sem1);
    PR_ASSERT(PR_FAILURE != rc);

    (*addr)++;
    PR_ASSERT((*addr % 2) == 1);
    if (optVerbose)
      PR_LOG(lm, msgLevel, ("nameshm1: Server pong: %d, i: %d", *addr, i));

    rc = PR_PostSemaphore(sem2);
    PR_ASSERT(PR_FAILURE != rc);
  }

  rc = PR_WaitProcess(proc, &exit_status);
  PR_ASSERT(PR_FAILURE != rc);

  rc = PR_CloseSemaphore(sem1);
  PR_ASSERT(PR_FAILURE != rc);

  rc = PR_CloseSemaphore(sem2);
  PR_ASSERT(PR_FAILURE != rc);

  rc = PR_DeleteSemaphore(SEM_NAME1);
  PR_ASSERT(PR_FAILURE != rc);

  rc = PR_DeleteSemaphore(SEM_NAME2);
  PR_ASSERT(PR_FAILURE != rc);

  rc = PR_DetachSharedMemory(shm, addr);
  if (PR_FAILURE == rc) {
    PR_LOG(lm, msgLevel,
           ("nameshm1: Server: Detach: Error: %ld. OSError: %ld", PR_GetError(),
            PR_GetOSError()));
    failed_already = 1;
    return;
  }
  PR_LOG(lm, msgLevel, ("nameshm1: Server: Detach: success: "));

  rc = PR_CloseSharedMemory(shm);
  if (PR_FAILURE == rc) {
    PR_LOG(lm, msgLevel,
           ("nameshm1: Server: Close: Error: %ld. OSError: %ld", PR_GetError(),
            PR_GetOSError()));
    failed_already = 1;
    return;
  }
  PR_LOG(lm, msgLevel, ("nameshm1: Server: Close: success: "));

  rc = PR_DeleteSharedMemory(optName);
  if (PR_FAILURE == rc) {
    PR_LOG(lm, msgLevel,
           ("nameshm1: Server: Destroy: Error: %ld. OSError: %ld",
            PR_GetError(), PR_GetOSError()));
    failed_already = 1;
    return;
  }
  PR_LOG(lm, msgLevel, ("nameshm1: Server: Destroy: success"));

  return;
} /* end ClientServerTest() */

int main(int argc, char** argv) {
  {
    /*
    ** Get command line options
    */
    PLOptStatus os;
    PLOptState* opt = PL_CreateOptState(argc, argv, "Cdvw:s:p:i:");

    while (PL_OPT_EOL != (os = PL_GetNextOpt(opt))) {
      if (PL_OPT_BAD == os) {
        continue;
      }
      switch (opt->option) {
        case 'v': /* debug mode */
          optVerbose = 1;
        /* no break! fall into debug option */
        case 'd': /* debug mode */
          debug = 1;
          msgLevel = PR_LOG_DEBUG;
          break;
        case 'w': /* try writing to memory mapped read-only */
          optWriteRO = 1;
          break;
        case 'C':
          optClient = 1;
          break;
        case 's':
          optSize = atol(opt->value) * 1024;
          break;
        case 'p':
          optPing = atol(opt->value);
          break;
        case 'i':
          optClientIterations = atol(opt->value);
          break;
        default:
          strcpy(optName, opt->value);
          break;
      }
    }
    PL_DestroyOptState(opt);
  }

  lm = PR_NewLogModule("Test"); /* Initialize logging */

  PR_LOG(lm, msgLevel, ("nameshm1: Starting"));

  if (optClient) {
    DoClient();
  } else {
    BasicTest();
    if (failed_already != 0) {
      goto Finished;
    }
    ReadOnlyTest();
    if (failed_already != 0) {
      goto Finished;
    }
    ClientServerTest();
  }

Finished:
  if (debug) {
    printf("%s\n", (failed_already) ? "FAIL" : "PASS");
  }
  return ((failed_already) ? 1 : 0);
} /* main() */
/* end instrumt.c */