CODEWITHSUNDEEP
c++java-native-interface
hahaha1256
hahaha1256

Reputation: 51

Should extern C wrap each one of my functions?

Should every function be wrapped by extern "C", or can I just write extern "C" { at the beginning of my list-of-functions-definitions and end the block at the very end with } ?

Upvotes: 0

Views: 193

Answers (2)

Mats Petersson
Mats Petersson

Reputation: 129504

In case you ever want to include the header in a C compiler (as opposed to C++ compiler), you may want to use:

 #ifdef __cplusplus
 extern "C" {
 #endif
 ... list of functions ... 
 #ifdef __cplusplus
 }
 #endif

Otherwise, both will do the same thing - any function declared within an extern "C" { ... } is the same as each function having extern "C" as part of its declaration.

Upvotes: 4

user2913094
user2913094

Reputation: 967

You can do either. Doing a single extern "C" block is my recommendation. It makes it clear that you mean to be providing a C-style API and avoids the risk of missing it on one function. If you one day decide to provide a C++ linkage version (or a conditionally compiled version), you'll only have to make the change in one place.

Upvotes: 1

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