concurrency
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concurrency [2017/04/13 03:50] barryfp |
concurrency [2017/06/23 09:41] barryfp |
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| Imagine a function: | Imagine a function: | ||
| - | <code dana> | + | <code d> |
| void printNumbers(int to) | void printNumbers(int to) | ||
| { | { | ||
| Line 17: | Line 17: | ||
| This prints out all of the numbers from 0 up to and including the given parameter. We can call this function synchronously by using: | This prints out all of the numbers from 0 up to and including the given parameter. We can call this function synchronously by using: | ||
| - | <code dana> | + | <code d> |
| printNumbers(100) | printNumbers(100) | ||
| </code> | </code> | ||
| Line 23: | Line 23: | ||
| In this case the caller is blocked until all numbers have been printed. Alternatively we can call this function asynchronously using: | In this case the caller is blocked until all numbers have been printed. Alternatively we can call this function asynchronously using: | ||
| - | <code dana> | + | <code d> |
| asynch::printNumbers(100) | asynch::printNumbers(100) | ||
| </code> | </code> | ||
| Line 37: | Line 37: | ||
| The ''join'' operator is simply used to wait for another thread to finish executing: | The ''join'' operator is simply used to wait for another thread to finish executing: | ||
| - | <code dana> | + | <code d> |
| Thread t = asynch::printNumbers(100) | Thread t = asynch::printNumbers(100) | ||
| t.join() | t.join() | ||
| Line 46: | Line 46: | ||
| The ''wait'' and ''signal'' operators allow for more controlled interaction between two threads. They are typically used when one thread needs to wait for a specific event to occur, where that event will arrive in a different thread: | The ''wait'' and ''signal'' operators allow for more controlled interaction between two threads. They are typically used when one thread needs to wait for a specific event to occur, where that event will arrive in a different thread: | ||
| - | <code dana> | + | <code d> |
| Thread main; | Thread main; | ||
| Line 72: | Line 72: | ||
| This can be done with the ''mutex'' control block which takes any Data type (or the Mutex type, which is a subtype of Data) as a parameter to lock: | This can be done with the ''mutex'' control block which takes any Data type (or the Mutex type, which is a subtype of Data) as a parameter to lock: | ||
| - | <code dana> | + | <code d> |
| Mutex myLock = new Mutex() | Mutex myLock = new Mutex() | ||
concurrency.txt ยท Last modified: 2018/02/09 03:59 by barryfp
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