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H.5 Pragma Detect_Blocking

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The following pragma forces an implementation to detect potentially blocking operations within a protected operation. 

Syntax

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The form of a pragma Detect_Blocking is as follows: 
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  pragma Detect_Blocking;

Post-Compilation Rules

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A pragma Detect_Blocking is a configuration pragma. 

Dynamic Semantics

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An implementation is required to detect a potentially blocking operation within a protected operation, and to raise Program_Error (see 9.5.1). 

Implementation Permissions

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An implementation is allowed to reject a compilation_unit if a potentially blocking operation is present directly within an entry_body or the body of a protected subprogram. 
NOTES
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11  An operation that causes a task to be blocked within a foreign language domain is not defined to be potentially blocking, and need not be detected. 

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