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field. (class lockf_t): Add lf_ver field. (lockf_t::lockf_t): Initialize lf_ver to 0. (class inode_t): Change i_wait to i_cnt. Change comment to explain change in usage. (inode_t:use): Rename from wait. Make private. (inode_t::unuse): Rename from unwait. Make private. (inode_t::inuse): Rename from waiting. Make private. (inode_t::notused): New public method to set use count to 0. (inode_t::unlock_and_remove): New method to unlock node and to delete it if it's unused in current process. (fhandler_base::del_my_locks): Drop global list lock. Drop variable no_locks_left. Simpify unlocking and removing node by just calling unlock_and_remove. (fixup_lockf_after_exec): Call notused method for each node. (inode_t::get): Call use method. Lock node only if outside of list lock. (inode_t::get_all_locks_list): Accommodate additional lf_ver field when creating lockf_t structure from object name. (lockf_t::create_lock_obj_attr): Accommodate additional lf_ver field when creating object name from lockf_t structure. Handle STATUS_OBJECT_NAME_COLLISION gracefully in F_POSIX case as well. Change comment accordingly. Increment lf_ver field rather than high byte of lf_wid field. Simplify comment. (fhandler_disk_file::lock): Always call unlock_and_remove rather than just UNLOCK on node. (lf_setlock): Move ret definition where it's used. Drop unneeded tests for obj being not NULL. Only check for deadlock condition if the lock we're trying to establish is a POSIX lock. Revamp object collecting and wait code to cover all cases. Don't return with EDEADLK if blocking process can't be opened for synchronization in F_POSIX case, rather just wait like in F_FLOCK case. Change system_printf to debug_printf in that case. Only run WaitForMultipleObjects with high priority. Close obj and process handles prior to locking node.
THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Cygwin documentation is available on the net at http://cygwin.com You might especially be interested in http://cygwin.com/faq/faq.programming.html#faq.programming.building-cygwin