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 /* -*- 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/. */

 /***********************************************************************

 **

 ** Name: fileio.c

 **

 ** Description: Program to copy one file to another. 

 **

 ** Modification History:

 ** 14-May-97 AGarcia- Converted the test to accomodate the debug_mode flag.

 **	         The debug mode will print all of the printfs associated with this test.

 **			 The regress mode will be the default mode. Since the regress tool limits

 **           the output to a one line status:PASS or FAIL,all of the printf statements

 **			 have been handled with an if (debug_mode) statement.

 ** 04-June-97 AGarcia removed the Test_Result function. Regress tool has been updated to

 **			recognize the return code from tha main program.

 ** 12-June-97 Revert to return code 0 and 1, remove debug option (obsolete).

 ***********************************************************************/

 /***********************************************************************

 ** Includes

 ***********************************************************************/

 #include "prinit.h"

 #include "prthread.h"

 #include "prlock.h"

 #include "prcvar.h"

 #include "prmon.h"

 #include "prmem.h"

 #include "prio.h"

 #include "prlog.h"

 #include <stdio.h>

 #include "obsolete/prsem.h"

 #define TBSIZE 1024

 static PRUint8 tbuf[TBSIZE];

 static PRFileDesc *t1, *t2;

 PRIntn failed_already=0;

 PRIntn debug_mode;

 static void InitialSetup(void)

 {

 	PRUintn	i;

 	PRInt32 nWritten, rv;

 	t1 = PR_Open("t1.tmp", PR_CREATE_FILE | PR_RDWR, 0);

 	PR_ASSERT(t1 != NULL);	

 	for (i=0; i<TBSIZE; i++)

 		tbuf[i] = i;

 	nWritten = PR_Write((PRFileDesc*)t1, tbuf, TBSIZE);

 	PR_ASSERT(nWritten == TBSIZE);	

 	rv = PR_Seek(t1,0,PR_SEEK_SET);

 	PR_ASSERT(rv == 0);	

    	t2 = PR_Open("t2.tmp", PR_CREATE_FILE | PR_RDWR, 0);

 	PR_ASSERT(t2 != NULL);	

 }

 static void VerifyAndCleanup(void)

 {

 	PRUintn	i;

 	PRInt32 nRead, rv;

 	for (i=0; i<TBSIZE; i++)

 		tbuf[i] = 0;

 	rv = PR_Seek(t2,0,PR_SEEK_SET);

 	PR_ASSERT(rv == 0);	

 	nRead = PR_Read((PRFileDesc*)t2, tbuf, TBSIZE);

 	PR_ASSERT(nRead == TBSIZE);	

 	for (i=0; i<TBSIZE; i++)

 		if (tbuf[i] != (PRUint8)i) {

 			if (debug_mode) printf("data mismatch for index= %d \n", i);

 			else failed_already=1;

 		}

    	PR_Close(t1);

    	PR_Close(t2);

    	PR_Delete("t1.tmp");

    	PR_Delete("t2.tmp");

     if (debug_mode) printf("fileio test passed\n");

 }

 /*------------------ Following is the real test program ---------*/

 /*

 	Program to copy one file to another.  Two temporary files get

 	created.  First one gets written in one write call.  Then,

 	a reader thread reads from this file into a double buffer.

 	The writer thread writes from double buffer into the other

 	temporary file.  The second temporary file gets verified

 	for accurate data.

 */

 PRSemaphore	*emptyBufs;	/* number of empty buffers */

 PRSemaphore *fullBufs;	/* number of buffers that are full */

 #define BSIZE	100

 struct {

 	char data[BSIZE];

 	PRUintn nbytes;		/* number of bytes in this buffer */

 } buf[2];

 static void PR_CALLBACK reader(void *arg)

 {

 	PRUintn	i = 0;

 	PRInt32	nbytes;

 	do {

 		(void) PR_WaitSem(emptyBufs);

 		nbytes = PR_Read((PRFileDesc*)arg, buf[i].data, BSIZE);

 		if (nbytes >= 0) {

 			buf[i].nbytes = nbytes;

 			PR_PostSem(fullBufs);

 			i = (i + 1) % 2;

 		}

 	} while (nbytes > 0);

 }

 static void PR_CALLBACK writer(void *arg)

 {

 	PRUintn	i = 0;

 	PRInt32	nbytes;

 	do {

 		(void) PR_WaitSem(fullBufs);

 		nbytes = buf[i].nbytes;

 		if (nbytes > 0) {

 			nbytes = PR_Write((PRFileDesc*)arg, buf[i].data, nbytes);

 			PR_PostSem(emptyBufs);

 			i = (i + 1) % 2;

 		}

 	} while (nbytes > 0);

 }

 int main(int argc, char **argv)

 {

 	PRThread *r, *w;

 	PR_Init(PR_USER_THREAD, PR_PRIORITY_NORMAL, 0);

     PR_STDIO_INIT();

     emptyBufs = PR_NewSem(2);	/* two empty buffers */

     fullBufs = PR_NewSem(0);	/* zero full buffers */

 	/* Create initial temp file setup */

 	InitialSetup();

 	/* create the reader thread */

 	r = PR_CreateThread(PR_USER_THREAD,

 				      reader, t1, 

 				      PR_PRIORITY_NORMAL,

 				      PR_LOCAL_THREAD,

     				  PR_JOINABLE_THREAD,

 				      0);

 	w = PR_CreateThread(PR_USER_THREAD,

 				      writer, t2, 

 				      PR_PRIORITY_NORMAL,

                       PR_LOCAL_THREAD,

                       PR_JOINABLE_THREAD,

                       0);

     /* Do the joining for both threads */

     (void) PR_JoinThread(r);

     (void) PR_JoinThread(w);

     /* Do the verification and clean up */

     VerifyAndCleanup();

     PR_DestroySem(emptyBufs);

     PR_DestroySem(fullBufs);

     PR_Cleanup();

     if(failed_already)

     {

         printf("Fail\n");

         return 1;

     }

     else

     {

         printf("PASS\n");

         return 0;

     }

 }