globus_callout(3) Globus Callout API


Callback API Activation.
Callout Handle Operations
Manage a Globus Callout Handle structure.
Callout Configuration
Register callouts.
Callout Invocation
Invoke callouts.
Callout Constants

Detailed Description

This API is intended to ease integration of configurable callouts into the Globus Toolkit and to provide a platform independent way of dealing with runtime loadable functions. It (hopefully) achieves this goal by providing the following functionality:

It provides a function for reading callout configuration files. Files are assumed to have the following format:
Anything after a # is assumed to be a comment
Blanks lines are ignored
Lines specifying callouts have the format

      abstract type           library         symbol

 where abstract type denotes the type of callout, e.g. globus_gram_jobmanager_authz, library denotes the library the callout can be found in and symbol denotes the function name of the callout.

  • It provides a API function for registering callouts
  • All callouts are assumed to have the function signature globus_result_t callout_func(va_list ap)
  • It provides a function for calling a callout given an abstract type. If multiple callouts are defined for the same abstract type then all callouts for the abstract type will be called. Implementers should not rely on any correlation between the order of configuration and the order of invocation of callouts of the same abstract type.

Any program that uses Globus Callout functions must include the globus_callout.h header

Function Categories

  • Activation
  • Callout Handle Operations
  • Callout Configuration
  • Callout Invocation
  • Callout Constants


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