ca35d41cec
* cygheap.h (cygheap_fdmanip::release): Make virtual. (cygheap_fdnew::~cygheap_fdnew): New destructor increments reference count when fd has been allocated. (cygheap_fdget::fh): New (old?) field. (cygheap_fdget::cygheap_fdget): Increment reference count when we've found an active fd. Set fh appropriately. (cygheap_fdget::~cygheap_fdget): Decrement reference count when appropriate. Delete fh if reference count goes to zero. (cygheap_fdget::release): New function. Do more bookkeping on release. * dtable.cc (dtable::release): Change from void to boolean return. Only delete the fhandler when its reference count is <= 0 (this should be a fairly unusual case). Return true if fhandler has been deleted. (cygwin_attach_handle_to_fd): Increment reference count when fh is assigned. (dtable::init_std_file_from_handle): Ditto. * dtable.h (dtable::release): Change return to boolean. * fhandler.cc (fhandler_base::fhandler_base): Set new isclosed flag to false. Set _refcnt to zero. (fhandler_base::close): Simplify paranoid debugging output. Set new isclosed() flag. (fhandler_base_overlapped::wait_overlapped): Use isclosed() flag to avoid querying the exception handle. * fhandler.h (fhandler_base::_refcnt): New field. (fhandler_base::refcnt): New function. (fhandler_base::isclosed): Implement. (fhandler_base::fhandler_base): Set isclosed to false. * syscalls.cc: Remove space after function before parentheses for several strace printfs. (dup): Add standard strace "leaver" code. (dup2): Ditto. (dup3): Ditto. (remove): Ditto. (getpid): Ditto. (getppid): Ditto. (lseek64): Fix strace debugging to correctly use %R. * fhandler_termios.cc (fhandler_termios::tcsetpgrp): Avoid sending signals to other processes if we're debugging since it can cause a deadlock with the calling debugger. * exceptions.cc (_cygtls::call_signal_handler): Add debugging-only strace output.
106 lines
3.2 KiB
C++
106 lines
3.2 KiB
C++
/* dtable.h: fd table definition.
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Copyright 2000, 2001, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
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2010, 2011 Red Hat, Inc.
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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/* Initial and increment values for cygwin's fd table */
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#define NOFILE_INCR 32
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/* Maximum size we allow expanding to. */
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#define OPEN_MAX_MAX (100 * NOFILE_INCR)
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#include "thread.h"
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#include "sync.h"
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class suffix_info;
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#define BFH_OPTS (PC_NULLEMPTY | PC_FULL | PC_POSIX)
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class dtable
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{
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fhandler_base **fds;
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#ifdef NEWVFORK
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fhandler_base **fds_on_hold;
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#endif
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fhandler_base **archetypes;
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unsigned narchetypes;
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unsigned farchetype;
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static const int initial_archetype_size = 8;
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int first_fd_for_open;
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int cnt_need_fixup_before;
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void lock () {lock_process::locker.acquire ();}
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void unlock () {lock_process::locker.release ();}
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public:
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size_t size;
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dtable () : archetypes (NULL), narchetypes (0), farchetype (0), first_fd_for_open(3), cnt_need_fixup_before(0) {}
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void init () {first_fd_for_open = 3;}
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void dec_need_fixup_before ()
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{ if (cnt_need_fixup_before > 0) --cnt_need_fixup_before; }
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void inc_need_fixup_before ()
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{ cnt_need_fixup_before++; }
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bool need_fixup_before ()
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{ return cnt_need_fixup_before > 0; }
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void move_fd (int, int);
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int vfork_child_dup ();
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void vfork_parent_restore ();
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void vfork_child_fixup ();
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fhandler_base *dup_worker (fhandler_base *oldfh, int flags);
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int extend (int howmuch);
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void fixup_after_fork (HANDLE);
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inline int not_open (int fd)
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{
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lock ();
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int res = fd < 0 || fd >= (int) size || fds[fd] == NULL;
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unlock ();
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return res;
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}
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int find_unused_handle (int start);
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int find_unused_handle () { return find_unused_handle (first_fd_for_open);}
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bool release (int fd) __attribute__ ((regparm (2)));
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void init_std_file_from_handle (int fd, HANDLE handle);
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int dup3 (int oldfd, int newfd, int flags);
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void fixup_after_exec ();
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inline fhandler_base *&operator [](int fd) const { return fds[fd]; }
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bool select_read (int fd, select_stuff *);
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bool select_write (int fd, select_stuff *);
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bool select_except (int fd, select_stuff *);
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operator fhandler_base **() {return fds;}
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void stdio_init ();
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void get_debugger_info ();
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void set_file_pointers_for_exec ();
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#ifdef NEWVFORK
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bool in_vfork_cleanup () {return fds_on_hold == fds;}
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#endif
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fhandler_base *find_archetype (device& dev);
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fhandler_base **add_archetype ();
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void delete_archetype (fhandler_base *);
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void fixup_before_exec (DWORD win_proc_id);
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void fixup_before_fork (DWORD win_proc_id);
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friend void dtable_init ();
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friend void __stdcall close_all_files (bool);
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friend class fhandler_disk_file;
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friend class cygheap_fdmanip;
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friend class cygheap_fdget;
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friend class cygheap_fdnew;
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friend class cygheap_fdenum;
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friend class lock_process;
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};
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fhandler_base *build_fh_dev (const device&, const char * = NULL);
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fhandler_base *build_fh_name (const char *, unsigned = 0, suffix_info * = NULL);
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fhandler_base *build_fh_pc (path_conv& pc);
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void dtable_init ();
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void stdio_init ();
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extern dtable fdtab;
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extern "C" int getfdtabsize ();
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extern "C" void setfdtabsize (int);
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