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* errno.cc (errmap): Handle ERROR_IO_PENDING.

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* fhandler.cc (fhandler_base::open): Make tape I/O asynchronous.
	* fhandler.h (class fhandler_dev_tape): Add mt_evt member.
	* fhandler_tape.cc (mtinfo_drive::initialize): Initialize async_writes.
	(mtinfo_drive::close): Handle async writes.
	(mtinfo_drive::read): Add mt_evt parameter.  Use overlapped I/O.
	(mtinfo_drive::async_wait): New function.
	(mtinfo_drive::write): Add mt_evt parameter.  Use overlapped I/O.
	Handle async writes.
	(mtinfo_drive::_set_pos): Handle async writes.
	(mtinfo_drive::set_partition): Ditto.
	(mtinfo_drive::prepare): Ditto.
	(mtinfo_drive::get_status): Drop useless "else".  Handle async_writes
	flag.
	(mtinfo_drive::set_options): Handle async_writes flags.
	(fhandler_dev_tape::close): Close mt_evt handle.
	(fhandler_dev_tape::raw_read): Create mt_evt handle and use in call
	to mtinfo_drive::read.
	(fhandler_dev_tape::raw_write): Create mt_evt handle and use in call
	to mtinfo_drive::write.
	* mtinfo.h (MTINFO_VERSION): Bump.
	(enum dirty_state): Add async_write_pending state.
	(class mtinfo_drive): Add OVERLAPPED struct "ov".  Add async_writes
	flag.
	(mtinfo_drive::async_wait): Add declaration.
	(mtinfo_drive::read): Add mt_evt parameter.
	(mtinfo_drive::write): Ditto.

	* registry.cc (load_registry_hive): Call enable_restore_privilege
	instead of set_process_privilege.
This commit is contained in:
Corinna Vinschen
2004-04-19 19:29:10 +00:00
parent da3c66eb9a
commit 0c8731b8f4
7 changed files with 130 additions and 23 deletions
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13
winsup/cygwin/mtinfo.h
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@@ -9,7 +9,7 @@ Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#define MTINFO_MAGIC 0x179b2af0
#define MTINFO_VERSION 1
#define MTINFO_VERSION 2
/* Maximum number of supported partitions per drive. */
#define MAX_PARTITION_NUM 64
@@ -33,7 +33,8 @@ enum dirty_state
{
clean,
has_read,
has_written
has_written,
async_write_pending
};
enum lock_state
@@ -67,9 +68,11 @@ class mtinfo_drive
lock_state lock;
TAPE_GET_DRIVE_PARAMETERS _dp;
TAPE_GET_MEDIA_PARAMETERS _mp;
OVERLAPPED ov;
struct status_flags
{
unsigned buffer_writes : 1;
unsigned async_writes : 1;
unsigned two_fm : 1;
unsigned fast_eom : 1;
unsigned auto_lock : 1;
@@ -101,6 +104,7 @@ class mtinfo_drive
int set_blocksize (HANDLE mt, long count);
int get_status (HANDLE mt, struct mtget *get);
int set_options (HANDLE mt, long options);
int async_wait (HANDLE mt, DWORD *bytes_written);
public:
void initialize (int num, bool first_time);
@@ -108,12 +112,13 @@ public:
int get_mp (HANDLE mt);
int open (HANDLE mt);
int close (HANDLE mt, bool rewind);
int read (HANDLE mt, void *ptr, size_t &ulen);
int write (HANDLE mt, const void *ptr, size_t &len);
int read (HANDLE mt, HANDLE mt_evt, void *ptr, size_t &ulen);
int write (HANDLE mt, HANDLE mt_evt, const void *ptr, size_t &len);
int ioctl (HANDLE mt, unsigned int cmd, void *buf);
int set_pos (HANDLE mt, int mode, long count, bool sfm_func);
IMPLEMENT_STATUS_FLAG (bool, buffer_writes)
IMPLEMENT_STATUS_FLAG (bool, async_writes)
IMPLEMENT_STATUS_FLAG (bool, two_fm)
IMPLEMENT_STATUS_FLAG (bool, fast_eom)
IMPLEMENT_STATUS_FLAG (bool, auto_lock)