site_archiver@lists.apple.com Delivered-To: darwin-dev@lists.apple.com -- Marc Majka On 3 Aug, 2005, at 15:13, Martin Bestmann wrote: On 03.08.2005, at 23:40, Marc Majka wrote: _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.appl... There's a destructor function associated with the thread-specific memory that is responsible for cleaning up when the thread exits. See the pthread_exit(3) man page. Each of the Libinfo routines attaches an appropriate destructor function, so the memory is not supposed to leak when the thread exits. If you are seeing a memory leak after a thread exits, let me know and I'll dig into it. Does this also mean when the thread terminates that the memory gets recycled. I could verify that the memory in the same thread gets recycled if I call getpwuid but I still have the memory allocated after my thread terminates. The Mac OS X implementations of a number of routines found in libSystem, including getpwnam and getpwuid, have been modified to be thread-safe. Rather than returning a pointer to a static data structure, these routines allocate a structure for the returned value that is stored in thread-specific memory. The memory is recycled (by each thread) every time you make a call to one of these routines. That allows you to use these APIs safely in multi- threaded applications. The specific routines in the Libinfo project (see Libinfo/ lookup.subproj/lu_*.c) that maintain thread-specific memory for results are: - alias_getbyname alias_getent alias_setent alias_endent - bootp_getbyether bootp_getbyip - bootparams_getbyname bootparams_getent bootparams_setent bootparams_endent - getfsbyname getfsspec getfsfile getfsent setfsent endfsent - initgroups getgrnam getgrgid getgrent setgrent endgrent - gethostbyaddr gethostbyname gethostbyname2 gethostent sethostent endhostent - getipnodebyname getipnodebyaddr - innetgr getnetgrent setnetgrent endnetgrent - getnetbyaddr getnetbyname getnetent setnetent endnetent - prdb_getbyname prdb_get prdb_set prdb_end - getprotobyname getprotobynumber getprotoent setprotoent endprotoent - getrpcbyname getrpcbynumber getrpcent setrpcent endrpcent - getservbyport getservbyname getservent setservent endservent - getpwnam getpwuid getpwent setpwent endpwent This email sent to site_archiver@lists.apple.com