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25 lines
1.4 KiB
TeX
25 lines
1.4 KiB
TeX
%begin
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\subsection{Asynchronous \kcode{target} with \kcode{nowait} and \kcode{depend} Clauses}
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\label{subsec:async_target_nowait_depend}
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\index{target construct@\kcode{target} construct!nowait clause@\kcode{nowait} clause}
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\index{target construct@\kcode{target} construct!depend clause@\kcode{depend} clause}
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\index{nowait clause@\kcode{nowait} clause}
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\index{depend clause@\kcode{depend} clause}
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\index{clauses!nowait@\kcode{nowait}}
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\index{clauses!depend@\kcode{depend}}
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More details on dependences can be found in \specref{sec:task_depend}, Task
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Dependences. In this example, there are three flow dependences. In the first two dependences the
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target task does not execute until the preceding explicit tasks have finished. These
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dependences are produced by arrays \ucode{v1} and \ucode{v2} with the \kcode{out} dependence type in the first two tasks, and the \kcode{in} dependence type in the \plc{target task}.
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The last dependence is produced by array \ucode{p} with the \kcode{out} dependence type in the target task, and the \kcode{in} dependence type in the last task. The last task does not execute until the target task finishes.
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The \kcode{nowait} clause on the \kcode{target} construct creates a deferrable target task, allowing the encountering task to continue execution without waiting for the completion of the target task.
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\cexample[4.5]{async_target}{4}
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\ffreeexample[4.5]{async_target}{4}
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%end
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