fork download

/*This code is in RTOS environment*/
/*Title: Encapsulating a Semaphore.*/
/*This is correct version*/
 
/*This code rather than letting just any code that
  wants the value of the lSecondsToday variable read
  it directly and hoping for the best, this construction
  forces any code that wants to know the value of lSecondsToday
  to call lSecondsSinceMidnight to get it*/
 
/*Once lSecondsSinceMidnight uses the semaphore correctly,
  this semaphore will cause no more bugs*/
 
// File: tmrtask.c
 
long int lSecondsToday;	//global variable
 
void vTimerTask(void){
	.
	.
	.
	GetSemaphore(SEMAPHORE_TIME_OF_DAY);	//this function is provided by RTOS vendor
	++lSecondsToday;
	if(lSecondsToday == 60 * 60 * 24){
		lSecondsToday = 0L;
	}
	GiveSemaphore(SEMAPHORE_TIME_OF_DAY);
	.
	.
	.
}
 
long lSecondSinceMidnight(void){
	long lReturnValue;
	GetSemaphore(SEMAPHORE_TIME_OF_DAY);
	lReturnValue = lSecondsToday;
	GiveSemaphore(SEMAPHORE_TIME_OF_DAY);
	return (lReturnValue);
}
-----------------------------------------------------
// File: hacker.c
 
long lSecondsSinceMidnight(void);
 
void vHackerTask(void){
	.
	.
	.
	lDeadline = lSecondSinceMidnight() + 1800L;
	.
	.
	.
	if(lSecondSinceMidnight() > 3600 * 12)
	.
	.
	.
}
--------------------------------------------------------
// File: junior.c
 
long lSecondsSinceMidnight(void);
 
void vJuniorProgrammerTask(void){
	long lTemp;
	.
	.
	.
	lTemp = lSecondSinceMidnight();
	for(l = lTemp; l < lTemp + 10; ++l)	// l is not mentioned by author
	.
	.
	.
}

Main.java:16: error: class, interface, or enum expected
long int lSecondsToday;	//global variable
^
Main.java:18: error: class, interface, or enum expected
void vTimerTask(void){
^
Main.java:23: error: class, interface, or enum expected
	++lSecondsToday;
	^
Main.java:24: error: class, interface, or enum expected
	if(lSecondsToday == 60 * 60 * 24){
	^
Main.java:26: error: class, interface, or enum expected
	}
	^
Main.java:28: error: class, interface, or enum expected
	.
	^
Main.java:35: error: class, interface, or enum expected
	GetSemaphore(SEMAPHORE_TIME_OF_DAY);
	^
Main.java:36: error: class, interface, or enum expected
	lReturnValue = lSecondsToday;
	^
Main.java:37: error: class, interface, or enum expected
	GiveSemaphore(SEMAPHORE_TIME_OF_DAY);
	^
Main.java:38: error: class, interface, or enum expected
	return (lReturnValue);
	^
Main.java:39: error: class, interface, or enum expected
}
^
Main.java:45: error: class, interface, or enum expected
void vHackerTask(void){
^
Main.java:50: error: class, interface, or enum expected
	.
	^
Main.java:63: error: class, interface, or enum expected
void vJuniorProgrammerTask(void){
^
Main.java:65: error: class, interface, or enum expected
	.
	^
Main.java:69: error: class, interface, or enum expected
	for(l = lTemp; l < lTemp + 10; ++l)	// l is not mentioned by author
	^
Main.java:69: error: class, interface, or enum expected
	for(l = lTemp; l < lTemp + 10; ++l)	// l is not mentioned by author
	               ^
Main.java:69: error: class, interface, or enum expected
	for(l = lTemp; l < lTemp + 10; ++l)	// l is not mentioned by author
	                               ^
18 errors

Standard output is empty