Async waits should get the function queue directly from the already-fetched thread-specific data pointer. (dm)


git-svn-id: svn://mielke.cc/main/brltty@7920 91a5dbb7-01b9-0310-9b5f-b28072856b6e
Split up async into multiple source files. (dm)


git-svn-id: svn://mielke.cc/main/brltty@7921 91a5dbb7-01b9-0310-9b5f-b28072856b6e
Ensure that the thread-specific key has indeed been created. (dm)


git-svn-id: svn://mielke.cc/main/brltty@7922 91a5dbb7-01b9-0310-9b5f-b28072856b6e
Simplify a small bit of async wait logic. (dm)


git-svn-id: svn://mielke.cc/main/brltty@7923 91a5dbb7-01b9-0310-9b5f-b28072856b6e
Only async_io needs our MS-DOS header. (dm)


git-svn-id: svn://mielke.cc/main/brltty@7924 91a5dbb7-01b9-0310-9b5f-b28072856b6e