90 lines
2.7 KiB
C++
90 lines
2.7 KiB
C++
/* dtable.h: fd table definition.
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Copyright 2000, 2001 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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#include "thread.h"
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class suffix_info;
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class dtable
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{
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fhandler_base **fds;
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fhandler_base **fds_on_hold;
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int first_fd_for_open;
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int cnt_need_fixup_before;
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int console_fds;
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public:
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size_t size;
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dtable () : first_fd_for_open(3), cnt_need_fixup_before(0), console_fds(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 dec_console_fds ();
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void inc_console_fds ()
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{ console_fds++; }
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BOOL has_console_fds ()
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{ return console_fds > 0; }
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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);
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int extend (int howmuch);
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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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void fixup_after_fork (HANDLE);
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fhandler_base *build_fhandler (int fd, DWORD dev, const char *unix_name,
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const char *win32_name = NULL, int unit = -1);
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fhandler_base *build_fhandler (int fd, DWORD dev, char *unix_name = NULL,
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const char *win32_name = NULL, int unit = -1);
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fhandler_base *build_fhandler_from_name (int fd, const char *name, HANDLE h,
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path_conv& pc,
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unsigned opts = PC_SYM_FOLLOW,
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suffix_info *si = NULL);
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inline int not_open (int fd)
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{
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SetResourceLock (LOCK_FD_LIST, READ_LOCK, "not_open");
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int res = fd < 0 || fd >= (int) size || fds[fd] == NULL;
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ReleaseResourceLock (LOCK_FD_LIST, READ_LOCK, "not open");
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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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void release (int fd);
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void init_std_file_from_handle (int fd, HANDLE handle);
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int dup2 (int oldfd, int newfd);
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void fixup_after_exec (HANDLE);
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inline fhandler_base *operator [](int fd) const { return fds[fd]; }
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select_record *select_read (int fd, select_record *s);
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select_record *select_write (int fd, select_record *s);
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select_record *select_except (int fd, select_record *s);
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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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};
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void dtable_init (void);
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void stdio_init (void);
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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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