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The C code fragment below was taken from an actual embedded real-time application, and is part of the SPI device driver. The first function is the actual interrupt service routine, while the second function is just a helper, called by the first. The code compiles with no warnings, but its behaviour at runtime is not what the programmer expected. void isrSpiTxComplete (void) spi Updatestats (); void spiUpdatestats (void) // update SPI stats in shared data structure mut exLock (spistatsMut ex); Spistats.TXOK++; mut exRelease (spiStatsMutex); What is the problem and what is the resulting behaviour?

The C code fragment below was taken from an actual embedded real-time application, and is part of the SPI device driver. The first function is the actual interrupt service routine, while the second function is just a helper, called by the first. The code compiles with no warnings, but its behaviour at runtime is not what the programmer expected. void isrSpiTxComplete (void) spi Updatestats (); void spiUpdatestats (void) // update SPI stats in shared data structure mut exLock (spistatsMut ex); Spistats.TXOK++; mut exRelease (spiStatsMutex); What is the problem and what is the resulting behaviour?

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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The C code fragment below was taken from an actual embedded real-time application, and is part of the SPI device driver. The first function is the actual interrupt service routine, while the second function is just a helper, called by the first. The code compiles with no warnings, but its behaviour at runtime is not what the programmer expected. void isrSpiTxComplete (void) spi Updatestats (); void spiUpdatestats (void) // update SPI stats in shared data structure mut exLock (spistatsMut ex); Spistats.TXOK++; mut exRelease (spiStatsMutex); What is the problem, and what is the resulting behaviour?
Transcribed Image Text:The C code fragment below was taken from an actual embedded real-time application, and is part of the SPI device driver. The first function is the actual interrupt service routine, while the second function is just a helper, called by the first. The code compiles with no warnings, but its behaviour at runtime is not what the programmer expected. void isrSpiTxComplete (void) spi Updatestats (); void spiUpdatestats (void) // update SPI stats in shared data structure mut exLock (spistatsMut ex); Spistats.TXOK++; mut exRelease (spiStatsMutex); What is the problem, and what is the resulting behaviour?
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