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How to check if buffer is empty?
If you want to check if the buffer holds no characters, you can use the strlen() function from string. h (make sure the buffer is \0-terminated after fread(). If you want to check if malloc failed, compare the pointer with NULL. NULL is a special value given to pointers to mean they point to anything.
When a buffer is empty?
The circular buffer is empty when: 1. No elements have been inserted in the circular buffer yet.
What is bounded buffer problem in OS?
The bounded-buffer problems (aka the producer-consumer problem) is a classic example of concurrent access to a shared resource. A bounded buffer lets multiple producers and multiple consumers share a single buffer. Producers must block if the buffer is full. Consumers must block if the buffer is empty.
What is the state of the buffer if it asked for data and Cannot provide it?
What is the state of the buffer if it asked for data and cannot provide it? Explanation: The buffer is said to be overrun if the buffer cannot accept any more data and said to be underrun if it asked for data but not able to provide it.
Is starvation an operating system?
Starvation is the problem that occurs when high priority processes keep executing and low priority processes get blocked for indefinite time. In heavily loaded computer system, a steady stream of higher-priority processes can prevent a low-priority process from ever getting the CPU.
Does FCFS suffer starvation?
FCFS can never suffer from starvation because it services requests based on Arrival Time. The request which comes first is served first.
Is there a way to check if the buffer is empty?
My first instinct was to find a way to check if the buffer is empty, and if so, cout the character and if not, proceed with couting the answer. But after a bit of googling I realized the task is not as easy as I initially thought…
What happens when a full buffer is not available?
If a full buffer is still not available, the Data Consumer increments the delay counter to indicate that it had to wait (delay) again for a full buffer, and waits the prescribed number of milliseconds ( parent delay = 15 (milliseconds)) before rechecking the buffer.
How to clear the input buffer in C?
In case of C : Using “ while ((getchar()) != ‘\ ’); ” : Typing “while ((getchar()) != ‘\ ’);” reads the buffer characters till the end and discards them(including newline) and using it after the “scanf()” statement clears the input buffer and allows the input in the desired container.
How do you clear a buffer in Java?
Using “ while ( (getchar ()) != ‘ ’); ” : Typing “while ( (getchar ()) != ‘ ’);” reads the buffer characters till the end and discards them (including newline) and using it after the “scanf ()” statement clears the input buffer and allows the input in the desired container.