This macro should be used if you want to setup callback function fired while pulse link message came.
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This macro will set on
.Bc
connections link set callback
.Bf
which is a function pointer of the type:
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.sp
.Btypedefvoid(*onpulse_t)(conn_t*,sexp_t*);
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.sp
This function will be called if connection link will receive pulse message. It will pass a pointer to the connection where pulse message came and prepared S expression. Please note, prepared S expression structure will be destroyed after a function call.