2402700d07
(LoadFuncEx2): Adapted from LoadFuncEx. Provides control of return value for
nonexistent function.
(NtQueryObject): Declare.
(IsDebuggerPresent): Declare via LoadFuncEx2 and always return true if not
available.
* debug.h (being_debugged): Just rely on IsDebuggerPresent return value.
* dtable.cc (handle_to_fn): New function.
(dtable::init_std_file_from_handle): Attempt to derive std handle's name via
handle_to_fn.
(dtable::build_fhandler_from_name): Fill in what we can in path_conv structure
when given a handle and path doesn't exist.
* fhandler.cc (fhandler_base::open): Don't set the file pointer here. Use
pc->exists () to determine if file exists rather than calling GetFileAttributes
again.
* fhandler.h (fhandler_base::exec_state_isknown): New method.
(fhandler_base::fstat_helper): Add extra arguments to declaration.
(fhandler_base::fstat_by_handle): Declare new method.
(fhandler_base::fstat_by_name): Declare new method.
* fhandler_disk_file (num_entries): Make __stdcall.
(fhandler_base::fstat_by_handle): Define new method.
(fhandler_base::fstat_by_name): Define new method.
(fhandler_base:fstat): Call fstat_by_{handle,name} as appropriate.
(fhandler_disk_file::fstat_helper): Accept extra arguments for filling out stat
structure. Move handle or name specific stuff to new methods above.
(fhandler_disk_file::open): Use real_path->exists rather than calling
GetFileAttributes again.
* ntdll.h (FILE_NAME_INFORMATION): Define new structure.
(OBJECT_INFORMATION_CLASS): Partially define new enum.
(OBJECT_NAME_INFORMATION): Define new structure.
(NtQueryInformationFile): New declaration.
(NtQueryObject): New declaration.
* path.cc (path_conv::fillin): Define new method.
* path.h (path_conv::fillin): Declare new method.
(path_conv::drive_thpe): Rename from 'get_drive_type'.
(path_conv::volser): Declare new method.
(path_conv::volname): Declare new method.
(path_conv::root_dir): Declare new method.
* syscalls.cc (fstat64): Send real path_conv to fstat as second argument.
101 lines
2.4 KiB
C++
101 lines
2.4 KiB
C++
/* poll.cc. Implements poll(2) via usage of select(2) call.
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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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#include "winsup.h"
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#include <sys/time.h>
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#include <sys/poll.h>
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#include <errno.h>
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#include <stdlib.h>
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#include "security.h"
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#include "fhandler.h"
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#include "path.h"
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#include "dtable.h"
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#include "cygerrno.h"
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#include "cygheap.h"
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#include "sigproc.h"
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extern "C"
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int
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poll (struct pollfd *fds, unsigned int nfds, int timeout)
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{
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int max_fd = 0;
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fd_set *read_fds, *write_fds, *except_fds;
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struct timeval tv = { timeout / 1000, (timeout % 1000) * 1000 };
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sigframe thisframe (mainthread);
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for (unsigned int i = 0; i < nfds; ++i)
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if (fds[i].fd > max_fd)
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max_fd = fds[i].fd;
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size_t fds_size = howmany(max_fd + 1, NFDBITS) * sizeof (fd_mask);
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read_fds = (fd_set *) alloca (fds_size);
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write_fds = (fd_set *) alloca (fds_size);
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except_fds = (fd_set *) alloca (fds_size);
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if (!read_fds || !write_fds || !except_fds)
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{
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set_errno (ENOMEM);
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return -1;
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}
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memset (read_fds, 0, fds_size);
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memset (write_fds, 0, fds_size);
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memset (except_fds, 0, fds_size);
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int invalid_fds = 0;
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for (unsigned int i = 0; i < nfds; ++i)
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{
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fds[i].revents = 0;
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if (!cygheap->fdtab.not_open(fds[i].fd))
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{
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if (fds[i].events & POLLIN)
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FD_SET(fds[i].fd, read_fds);
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if (fds[i].events & POLLOUT)
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FD_SET(fds[i].fd, write_fds);
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if (fds[i].events & POLLPRI)
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FD_SET(fds[i].fd, except_fds);
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}
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else if (fds[i].fd >= 0)
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{
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++invalid_fds;
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fds[i].revents = POLLNVAL;
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}
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}
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if (invalid_fds)
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return invalid_fds;
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int ret = cygwin_select (max_fd + 1, read_fds, write_fds, except_fds, timeout < 0 ? NULL : &tv);
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if (ret > 0)
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for (unsigned int i = 0; i < nfds; ++i)
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{
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if (fds[i].fd >= 0)
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{
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if (cygheap->fdtab.not_open(fds[i].fd))
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fds[i].revents = POLLHUP;
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else
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{
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if (FD_ISSET(fds[i].fd, read_fds))
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fds[i].revents |= POLLIN;
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if (FD_ISSET(fds[i].fd, write_fds))
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fds[i].revents |= POLLOUT;
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if (FD_ISSET(fds[i].fd, read_fds) && FD_ISSET(fds[i].fd, write_fds))
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fds[i].revents |= POLLERR;
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if (FD_ISSET(fds[i].fd, except_fds))
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fds[i].revents |= POLLPRI;
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}
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}
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}
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return ret;
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}
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