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2002-09-17 Robert Collins <rbtcollins@hotmail.com>

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This work inspires by Thomas Pfaff's pthread_fork patch (1).
        * fork.cc (fork_child): Remove MTinterface fixup call, it's
        adsorbed by pthread::atforkchild.
        Rename __pthread_atforkchild to pthread::atforkchild to give
        access to private members.
        (fork_parent): Rename __pthread_atforkparent to
        pthread::atforkparent to give it access to private members.
        Ditto for __pthread_atforkprepare.
        * thread.cc: Fix some formatting problems throughout.
        (MTinterface::fixup_before_fork): Implement.
        (MTinterface::fixup_after_fork): Fix pthread_keys.
        (pthread_key::keys): Implement.
        (pthread_key::fixup_before_fork): Ditto.
        (pthread_key::fixup_after_fork): Ditto.
        (pthread_key::pthread_key): Add to pthread_key::keys.
        (pthread_key::~pthread_key): Remove from pthread_key::keys.
        (pthread_key::saveKeyToBuffer): Implement.
        (pthread_key::recreateKeyFromBuffer): Ditto.
        (pthread::atforkprepare): Prepare all MT classes for fork.
        (pthread::atforkchild): And fix them up afterwards.
        * thread.h (pthread_key): Buffer the key value during
        fork in fork_buf.
        List the keys needing to be fixed up in a linked list with
        head pthread_key::keys.
        (pthread): Move atfork cygwin internal calls into the class.
        (MTInterface): Provide a fixup_before_fork for objecst that
        need to save state.
        (__pthread_atforkprepare): Remove.
        (__pthread_atforkparent): Remove.
        (__pthread_atforkchild): Remove.
This commit is contained in:
Robert Collins
2002-09-17 09:12:36 +00:00
parent cbb704cf60
commit f1f1379560
4 changed files with 148 additions and 37 deletions
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9
winsup/cygwin/fork.cc
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@@ -313,10 +313,8 @@ fork_child (HANDLE& hParent, dll *&first_dll, bool& load_dlls)
if ((*t)->clear_on_fork ())
(*t)->set ();
user_data->threadinterface->fixup_after_fork ();
wait_for_sigthread ();
__pthread_atforkchild ();
pthread::atforkchild ();
cygbench ("fork-child");
return 0;
}
@@ -354,8 +352,7 @@ fork_parent (HANDLE& hParent, dll *&first_dll,
DWORD rc;
PROCESS_INFORMATION pi = {0, NULL, 0, 0};
/* call the pthread_atfork prepare functions */
__pthread_atforkprepare ();
pthread::atforkprepare ();
subproc_init ();
@@ -601,7 +598,7 @@ fork_parent (HANDLE& hParent, dll *&first_dll,
ForceCloseHandle (forker_finished);
forker_finished = NULL;
pi.hThread = NULL;
__pthread_atforkparent ();
pthread::atforkparent ();
return forked->pid;