\pagebreak
\chapter{Asynchronous Execution of a \code{target} Region Using Tasks}
\label{chap:async_target}

The following example shows how the \code{task} and \code{target} constructs 
are used to execute multiple \code{target} regions asynchronously. The task that 
encounters the \code{task} construct generates an explicit task that contains 
a \code{target} region. The thread executing the explicit task encounters a task 
scheduling point while waiting for the execution of the \code{target} region 
to complete, allowing the thread to switch back to the execution of the encountering 
task or one of the previously generated explicit tasks.

\cexample{async_target}{1c}

The Fortran version has an interface block that contains the \code{declare} \code{target}. 
An identical statement exists in the function declaration (not shown here).

\fexample{async_target}{1f}

The following example shows how the \code{task} and \code{target} constructs 
are used to execute multiple \code{target} regions asynchronously. The task dependence 
ensures that the storage is allocated and initialized on the device before it is 
accessed.

\cexample{async_target}{2c}

The Fortran example uses allocatable arrays for dynamic memory on the device. 

\fexample{async_target}{2f}