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Add a comment to explain why evdns_request is now separte from request

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This commit is contained in:
Nick Mathewson 2010-04-23 14:04:03 -04:00
parent 39b870b8a0
commit ceefbe8730
1 changed files with 5 additions and 2 deletions
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7
evdns.c
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@ -148,7 +148,10 @@ typedef unsigned int uint;
#define CLASS_INET EVDNS_CLASS_INET
/* persistent handle */
/* Persistent handle. We keep this separate from 'struct request' since we
* need some object to last for as long as an evdns_request is outstanding so
* that it can be cancelled, whereas a search request can lead to multiple
* 'struct request' instances being created over its lifetime. */
struct evdns_request {
struct request *current_req;
@ -182,7 +185,7 @@ struct request {
char **put_cname_in_ptr; /* store the cname here if we get one. */
struct evdns_base *base;
struct evdns_request *handle;
};