1 files changed, 102 insertions, 0 deletions
diff --git a/winsup/cygwin/dtable.h b/winsup/cygwin/dtable.h
new file mode 100644
index 00000000000..fcf29e1f4a1
--- /dev/null
+++ b/winsup/cygwin/dtable.h
@@ -0,0 +1,102 @@
+/* dtable.h: fd table definition.
+
+   Copyright 2000, 2001, 2003 Red Hat, Inc.
+
+This file is part of Cygwin.
+
+This software is a copyrighted work licensed under the terms of the
+Cygwin license.  Please consult the file "CYGWIN_LICENSE" for
+details. */
+
+/* Initial and increment values for cygwin's fd table */
+#define NOFILE_INCR    32
+
+#include "thread.h"
+#include "sync.h"
+
+class suffix_info;
+class fhandler_fifo;
+
+#define BFH_OPTS (PC_NULLEMPTY | PC_FULL | PC_POSIX)
+class dtable
+{
+  muto *lock_cs;
+  fhandler_base **fds;
+#ifdef NEWVFORK
+  fhandler_base **fds_on_hold;
+#endif
+  fhandler_base **archetypes;
+  unsigned narchetypes;
+  unsigned farchetype;
+  static const int initial_archetype_size = 8;
+  int first_fd_for_open;
+  int cnt_need_fixup_before;
+  void lock () {lock_cs->acquire ();}
+  void unlock () {lock_cs->release ();}
+  void init_lock ();
+public:
+  size_t size;
+
+  dtable () : archetypes (NULL), narchetypes (0), farchetype (0), first_fd_for_open(3), cnt_need_fixup_before(0) {}
+  void init () {first_fd_for_open = 3;}
+
+  void dec_need_fixup_before ()
+    { if (cnt_need_fixup_before > 0) --cnt_need_fixup_before; }
+  void inc_need_fixup_before ()
+    { cnt_need_fixup_before++; }
+  bool need_fixup_before ()
+    { return cnt_need_fixup_before > 0; }
+
+  int vfork_child_dup ();
+  void vfork_parent_restore ();
+  void vfork_child_fixup ();
+  fhandler_base *dup_worker (fhandler_base *oldfh);
+  int extend (int howmuch);
+  void fixup_before_exec (DWORD win_proc_id);
+  void fixup_before_fork (DWORD win_proc_id);
+  void fixup_after_fork (HANDLE);
+  inline int not_open (int fd)
+  {
+    lock ();
+    int res = fd < 0 || fd >= (int) size || fds[fd] == NULL;
+    unlock ();
+    return res;
+  }
+  int find_unused_handle (int start);
+  int find_unused_handle () { return find_unused_handle (first_fd_for_open);}
+  void release (int fd);
+  void init_std_file_from_handle (int fd, HANDLE handle);
+  int dup2 (int oldfd, int newfd);
+  void fixup_after_exec (HANDLE);
+  inline fhandler_base *&operator [](int fd) const { return fds[fd]; }
+  select_record *select_read (int fd, select_record *s);
+  select_record *select_write (int fd, select_record *s);
+  select_record *select_except (int fd, select_record *s);
+  operator fhandler_base **() {return fds;}
+  void stdio_init ();
+  void get_debugger_info ();
+  void set_file_pointers_for_exec ();
+#ifdef NEWVFORK
+  bool in_vfork_cleanup () {return fds_on_hold == fds;}
+#endif
+  fhandler_fifo *find_fifo (ATOM);
+  fhandler_base *find_archetype (device& dev);
+  fhandler_base **add_archetype ();
+  void delete_archetype (fhandler_base *);
+  friend void dtable_init ();
+  friend void __stdcall close_all_files ();
+  friend class cygheap_fdmanip;
+  friend class cygheap_fdget;
+  friend class cygheap_fdnew;
+};
+
+fhandler_base *build_fh_dev (const device&, const char * = NULL);
+fhandler_base *build_fh_name (const char *unix_name, HANDLE = NULL, unsigned = 0, suffix_info * = NULL);
+fhandler_base *build_fh_pc (path_conv& pc);
+
+void dtable_init (void);
+void stdio_init (void);
+extern dtable fdtab;
+
+extern "C" int getfdtabsize ();
+extern "C" void setfdtabsize (int);