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multi: introduce sh_getentry() for looking up sockets in the sockhash

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Simplify the code by using a single entry that looks for a socket in the
socket hash. As indicated in #712, the code looked for CURL_SOCKET_BAD
at some point and that is ineffective/wrong and this makes it easier to
avoid that.
This commit is contained in:
Daniel Stenberg 2016-03-14 09:18:01 +01:00
parent c0717a7059
commit 8eaf884417
1 changed files with 20 additions and 22 deletions
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42
lib/multi.c
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@ -172,13 +172,22 @@ struct Curl_sh_entry {
#define SH_READ 1
#define SH_WRITE 2
/* look up a given socket in the socket hash, skip invalid sockets */
static struct Curl_sh_entry *sh_getentry(struct curl_hash *sh,
curl_socket_t s)
{
if(s != CURL_SOCKET_BAD)
/* only look for proper sockets */
return Curl_hash_pick(sh, (char *)&s, sizeof(curl_socket_t));
return NULL;
}
/* make sure this socket is present in the hash for this handle */
static struct Curl_sh_entry *sh_addentry(struct curl_hash *sh,
curl_socket_t s,
struct SessionHandle *data)
{
struct Curl_sh_entry *there =
Curl_hash_pick(sh, (char *)&s, sizeof(curl_socket_t));
struct Curl_sh_entry *there = sh_getentry(sh, s);
struct Curl_sh_entry *check;
if(there)
@ -206,15 +215,9 @@ static struct Curl_sh_entry *sh_addentry(struct curl_hash *sh,
/* delete the given socket + handle from the hash */
static void sh_delentry(struct curl_hash *sh, curl_socket_t s)
{
struct Curl_sh_entry *there =
Curl_hash_pick(sh, (char *)&s, sizeof(curl_socket_t));
if(there) {
/* this socket is in the hash */
/* We remove the hash entry. (This'll end up in a call to
sh_freeentry().) */
Curl_hash_delete(sh, (char *)&s, sizeof(curl_socket_t));
}
/* We remove the hash entry. This will end up in a call to
sh_freeentry(). */
Curl_hash_delete(sh, (char *)&s, sizeof(curl_socket_t));
}
/*
@ -2019,7 +2022,7 @@ static void singlesocket(struct Curl_multi *multi,
s = socks[i];
/* get it from the hash */
entry = Curl_hash_pick(&multi->sockhash, (char *)&s, sizeof(s));
entry = sh_getentry(&multi->sockhash, s);
if(curraction & GETSOCK_READSOCK(i))
action |= CURL_POLL_IN;
@ -2070,7 +2073,7 @@ static void singlesocket(struct Curl_multi *multi,
/* this socket has been removed. Tell the app to remove it */
remove_sock_from_hash = TRUE;
entry = Curl_hash_pick(&multi->sockhash, (char *)&s, sizeof(s));
entry = sh_getentry(&multi->sockhash, s);
if(entry) {
/* check if the socket to be removed serves a connection which has
other easy-s in a pipeline. In this case the socket should not be
@ -2151,8 +2154,7 @@ void Curl_multi_closed(struct connectdata *conn, curl_socket_t s)
if(multi) {
/* this is set if this connection is part of a handle that is added to
a multi handle, and only then this is necessary */
struct Curl_sh_entry *entry =
Curl_hash_pick(&multi->sockhash, (char *)&s, sizeof(s));
struct Curl_sh_entry *entry = sh_getentry(&multi->sockhash, s);
if(entry) {
if(multi->socket_cb)
@ -2253,8 +2255,7 @@ static CURLMcode multi_socket(struct Curl_multi *multi,
}
else if(s != CURL_SOCKET_TIMEOUT) {
struct Curl_sh_entry *entry =
Curl_hash_pick(&multi->sockhash, (char *)&s, sizeof(s));
struct Curl_sh_entry *entry = sh_getentry(&multi->sockhash, s);
if(!entry)
/* Unmatched socket, we can't act on it but we ignore this fact. In
@ -2741,9 +2742,7 @@ CURLMcode curl_multi_assign(CURLM *multi_handle,
struct Curl_sh_entry *there = NULL;
struct Curl_multi *multi = (struct Curl_multi *)multi_handle;
if(s != CURL_SOCKET_BAD)
there = Curl_hash_pick(&multi->sockhash, (char *)&s,
sizeof(curl_socket_t));
there = sh_getentry(&multi->sockhash, s);
if(!there)
return CURLM_BAD_SOCKET;
@ -2821,8 +2820,7 @@ void Curl_multi_dump(const struct Curl_multi *multi_handle)
statename[data->mstate], data->numsocks);
for(i=0; i < data->numsocks; i++) {
curl_socket_t s = data->sockets[i];
struct Curl_sh_entry *entry =
Curl_hash_pick(&multi->sockhash, (char *)&s, sizeof(s));
struct Curl_sh_entry *entry = sh_getentry(&multi->sockhash, s);
fprintf(stderr, "%d ", (int)s);
if(!entry) {