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Corrected potential mutex lock problem

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git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@1130 b45a01b8-16f6-495d-af2f-9b41ad6348cc
This commit is contained in:
csoler 2009-04-16 19:36:58 +00:00
parent 33146cc7dc
commit 1aaf6f5c27
1 changed files with 16 additions and 10 deletions
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26
libretroshare/src/tcponudp/extaddrfinder.cc
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@ -14,8 +14,6 @@
#include <vector>
#include <algorithm>
#define EXTADDRSEARCH_DEBUG
static const std::string ADDR_AGENT = "Mozilla/5.0";
static std::string scan_ip(const std::string& text)
@ -180,8 +178,6 @@ bool ExtAddrFinder::hasValidIP(struct sockaddr_in *addr)
#ifdef EXTADDRSEARCH_DEBUG
std::cerr << "ExtAddrFinder: Getting ip." << std::endl ;
#endif
RsStackMutex mut(_addrMtx) ;
if(*_found)
{
#ifdef EXTADDRSEARCH_DEBUG
@ -191,14 +187,26 @@ bool ExtAddrFinder::hasValidIP(struct sockaddr_in *addr)
return true ;
}
if(!*_searching)
if(_addrMtx.trylock())
{
if(!*_searching)
{
#ifdef EXTADDRSEARCH_DEBUG
std::cerr << "ExtAddrFinder: No stored ip: Initiating new search." << std::endl ;
std::cerr << "ExtAddrFinder: No stored ip: Initiating new search." << std::endl ;
#endif
*_searching = true ;
start_request() ;
*_searching = true ;
start_request() ;
}
#ifdef EXTADDRSEARCH_DEBUG
else
std::cerr << "ExtAddrFinder: Already searching." << std::endl ;
#endif
_addrMtx.unlock();
}
#ifdef EXTADDRSEARCH_DEBUG
else
std::cerr << "ExtAddrFinder: (Note) Could not acquire lock. Busy." << std::endl ;
#endif
return false ;
}
@ -241,7 +249,5 @@ ExtAddrFinder::ExtAddrFinder()
_ip_servers.push_back(std::string( "www.showmyip.com" )) ;
_ip_servers.push_back(std::string( "showip.net" )) ;
_ip_servers.push_back(std::string( "www.displaymyip.com")) ;
start_request() ;
}