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callback/trampoline_r/README

 

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This directory contains a reentrant version of the trampoline package.

 

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Instead of clobbering a global variable, a pointer to data0,data1,...

 

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is passed to the called function in a special CPU register.

 

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The number of supported data words (data0,data1) is arbitrary; 3 or 4

 

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or more would work as well if trampoline.c was modified appropriately.

 

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Two words are needed, however, for passing closures through vacall_r

 

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without an additional malloc() call per closure.

 

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The include file <trampoline.h> is renamed to <trampoline_r.h>.

 

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