vfs_select.h, respectively moved most of it into the new kernel
private header wait_for_objects.h.
* Added new experimental API functions wait_for_objects[_etc](). They
work pretty much like poll(), but also for semaphores, ports, and
threads.
* Removed the "ref" parameter from notify_select_events() and the
select_sync_pool functions as well as from fd_ops::fd_[de]select(). It
is no longer needed. The FS interface select() hook still has it,
though -- the VFS will always pass 0.
* de]select_fd() take a select_info* instead of a select_sync* + ref
pair, now. Added respective functions for semaphores, ports, and
threads.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22416 a95241bf-73f2-0310-859d-f6bbb57e9c96
* Reworked the select support:
- The io_context additionally stores a table of lists of select_infos,
which enables it to deselect events of a pending select() when
closing a FD. This prevents a race condition potentially causing a
write to stale memory.
- The opaque selectsync* passed to FSs is now actually a select_info*.
This was necessary, since the FDs deselect() hook (unlike the
select() hook) doesn't take a "ref" argument and deselecting a
single info (e.g. caused by a premature close()) was not possible.
The select() hook's "ref" argument has become superfluous.
- It should now be relatively easy to implement a poll_on_steroids()
that can also wait for objects other than FDs (e.g. semaphores,
ports, threads etc.).
* Set/reset the signal mask in common_select(). This makes pselect()
work as required.
* Reorganized vfs_resize_fd_table().
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22391 a95241bf-73f2-0310-859d-f6bbb57e9c96
can now safely unmount volumes that are still in use by some applications.
Minor fixes to the FD disconnection implementation:
* put_fd() checked the condition for being able to disconnect a descriptor
incorrectly (causing the FD to never be disconnected).
* remove_fd() would hand out disconnected descriptors (but should have
returned NULL for them).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15952 a95241bf-73f2-0310-859d-f6bbb57e9c96
service depends on it, it doesn't make any sense to call it that early in the
game.
* The VFS now has a low memory handler for vnodes as well. If there is enough
memory left, it won't free any vnodes anymore.
* Potential crashing bug fix: some functions did not check if the FD passed
in belonged to the right type; they just assumed it had a valid vnode, but
it could have had a mount structure associated as well.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15566 a95241bf-73f2-0310-859d-f6bbb57e9c96
per file descriptor (a descriptor can be shared among several slots). There is now a
second table in the io_context structure that contains that information in a bitmap.
There are now two new (private) functions to control the close-on-exec flag, fd_close_on_exec(),
and fd_set_close_on_exec().
F_DUPFD, dup(), and dup2() are supposed to clear the close-on-exec flag on the duplicated
slot - this fixes bug #57 (no output after a redirect of a shell builtin).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@14313 a95241bf-73f2-0310-859d-f6bbb57e9c96
removed unused headers. Adapted sources to still compile with the new
header locations.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@11913 a95241bf-73f2-0310-859d-f6bbb57e9c96
