DTR Flow Control

Michael Cardenas michaelc at lindows.com
Mon Feb 25 15:33:09 CST 2002 

Attached is the output of +relay,+file,+comm.

It looks like ClearCommError is returning 20, which is "ERROR_BAD_UNIT", 
system cannot find the device specified. Shouldn't this be returning 
ERROR_IO_PENDING for overlapped io?

I changed files/file.c to call SetLastError(ERROR_IO_PENDING) after the 
call to read(...) in the FD_TYPE_OVERLAPPED case instead of calling 
FILE_SetDosError, but that caused my app to not even be able to talk to 
the modem to get it to connect, so apparently that's not the problem.

 
-------------- next part --------------
08d06170:Call kernel32.CreateFileA(41f4f34c "COM1",c0000000,00000000,00000000,00000003,40000080,00000000) ret=6c11415d
trace:file:CreateFileA COM1 GENERIC_READ GENERIC_WRITE OPEN_EXISTING FILE_FLAG_OVERLAPPED  attributes 0x40000080
trace:file:CreateFileA opening device 'COM1'
trace:file:DOSFS_CreateCommPort COM1 c0000000 40000080
trace:file:CreateFileA returning 00000328
08d06170:Ret  kernel32.CreateFileA() retval=00000328 ret=6c11415d
08d06170:Call kernel32.SetupComm(00000328,00005f38,00002000) ret=6c1144eb
fixme:comm:SetupComm insize 24376 outsize 8192 unimplemented stub
08d06170:Ret  kernel32.SetupComm() retval=00000001 ret=6c1144eb
08d06170:Call kernel32.GetCommState(00000328,443e6e6c) ret=6c114503
trace:comm:GetCommState handle 808, ptr 0x443e6e6c
trace:comm:GetCommState OK
trace:comm:GetCommState bytesize 8 baudrate 115200 fParity 1 Parity 0 stopbits 1
trace:comm:GetCommState ~IXON ~IXOFF
trace:comm:GetCommState CRTSCTS
08d06170:Ret  kernel32.GetCommState() retval=00000001 ret=6c114503
08d06170:Call kernel32.SetCommState(00000328,443e6e6c) ret=6c114565
trace:comm:SetCommState handle 808, ptr 0x443e6e6c
trace:comm:SetCommState bytesize 8 baudrate 115200 fParity 1 Parity 0 stopbits 1
trace:comm:SetCommState ~IXON ~IXOFF
trace:comm:SetCommState CRTSCTS
08d06170:Ret  kernel32.SetCommState() retval=00000001 ret=6c114565
08d06170:Call kernel32.SetCommTimeouts(00000328,443e6ea0) ret=6c1141ca
trace:comm:SetCommTimeouts (328,0x443e6ea0)
08d06170:Ret  kernel32.SetCommTimeouts() retval=00000001 ret=6c1141ca
08d06170:Call kernel32.PurgeComm(00000328,0000000f) ret=6c1141f2
trace:comm:PurgeComm handle 808, flags f
08d06170:Ret  kernel32.PurgeComm() retval=00000001 ret=6c1141f2
08d06170:Call kernel32.EscapeCommFunction(00000328,00000005) ret=6c114224
trace:comm:EscapeCommFunction handle 808, function=5
trace:comm:EscapeCommFunction SETDTR
08d06170:Ret  kernel32.EscapeCommFunction() retval=00000001 ret=6c114224
08d06170:Call kernel32.CreateEventA(41f51260,00000001,00000000,00000000) ret=6c111bfc
08d06170:Ret  kernel32.CreateEventA() retval=0000032c ret=6c111bfc
08d06170:Call kernel32.CreateThread(00000000,00000000,78002432,41f511f0,00000000,443e6e8c) ret=78002426
08b947e0:Ret  kernel32.CreateThread() retval=00000320 ret=78002426
08b947e0:Call kernel32.Sleep(00000001) ret=6c1106ce
08b947e0:Ret  kernel32.Sleep() retval=00000102 ret=6c1106ce
08b947e0:Call kernel32.Sleep(00000001) ret=6c1106ce
08b947e0:Ret  kernel32.Sleep() retval=00000102 ret=6c1106ce
08b947e0:Call user32.PeekMessageA(405b620c,00000000,00000000,00000000,00000003) ret=60f0119b
08b947e0:Ret  user32.PeekMessageA() retval=00000001 ret=60f0119b
08b947e0:Call user32.TranslateMessage(405b620c) ret=60f011b4
08b947e0:Ret  user32.TranslateMessage() retval=00000000 ret=60f011b4
08b947e0:Call user32.DispatchMessageA(405b620c) ret=60f011ba
08b947e0:Call window proc 0x60f05450 (hwnd=0001002a,msg=WM_USER+04d8,wp=00000000,lp=00000000)
08b947e0:Call kernel32._llseek(00000108,00430e24,00000000) ret=60f0f86e
trace:file:SetFilePointer handle 264 offset 4394532 high 0 origin 0
08b947e0:Ret  kernel32._llseek() retval=00430e24 ret=60f0f86e
08b947e0:Call kernel32._hread(00000108,405b5eac,0000001a) ret=60f0f883
trace:file:ReadFile 264 0x405b5eac 26 0x405b5db4 (nil)
08b947e0:Ret  kernel32._hread() retval=0000001a ret=60f0f883
08b947e0:Call kernel32._llseek(00000108,00430e3e,00000000) ret=60f0f027
trace:file:SetFilePointer handle 264 offset 4394558 high 0 origin 0
08b947e0:Ret  kernel32._llseek() retval=00430e3e ret=60f0f027
08b947e0:Call kernel32._hread(00000108,41f511a0,00000040) ret=60f0f048
trace:file:ReadFile 264 0x41f511a0 64 0x405b5dd4 (nil)
08b947e0:Ret  kernel32._hread() retval=00000040 ret=60f0f048
08d06360:Starting thread (entryproc=0x78002432)
08d06360:Call PE DLL (proc=0xbfe21038,module=bfe20000,type=2,res=(nil))
08d06360:Ret  PE DLL (proc=0xbfe21038,module=bfe20000,type=2,res=(nil)) retval=1
08d06360:Call PE DLL (proc=0x40839b80,module=40829000,type=2,res=(nil))
08d06360:Ret  PE DLL (proc=0x40839b80,module=40829000,type=2,res=(nil)) retval=1
08d06360:Call PE DLL (proc=0x4079f7d0,module=40791000,type=2,res=(nil))
08d06360:Ret  PE DLL (proc=0x4079f7d0,module=40791000,type=2,res=(nil)) retval=1
08d06360:Call PE DLL (proc=0x40a90350,module=40a82000,type=2,res=(nil))
08d06360:Ret  PE DLL (proc=0x40a90350,module=40a82000,type=2,res=(nil)) retval=1
08d06360:Call PE DLL (proc=0x40682b1c,module=4065a000,type=2,res=(nil))
08d06360:Ret  PE DLL (proc=0x40682b1c,module=4065a000,type=2,res=(nil)) retval=1
08d06360:Call PE DLL (proc=0x41c7bc80,module=41c75000,type=2,res=(nil))
08d06360:Ret  PE DLL (proc=0x41c7bc80,module=41c75000,type=2,res=(nil)) retval=1
08d06360:Call PE DLL (proc=0x405ee65c,module=405d4000,type=2,res=(nil))
08d06360:Ret  PE DLL (proc=0x405ee65c,module=405d4000,type=2,res=(nil)) retval=1
08d06360:Call PE DLL (proc=0x78001c48,module=78000000,type=2,res=(nil))
08d06360:Ret  PE DLL (proc=0x78001c48,module=78000000,type=2,res=(nil)) retval=1
08d06360:Call PE DLL (proc=0x408d2220,module=408c1000,type=2,res=(nil))
08d06360:Ret  PE DLL (proc=0x408d2220,module=408c1000,type=2,res=(nil)) retval=1
08d06360:Call PE DLL (proc=0x658417c0,module=65840000,type=2,res=(nil))
08d06360:Ret  PE DLL (proc=0x658417c0,module=65840000,type=2,res=(nil)) retval=1
08d06360:Call PE DLL (proc=0x6509f2bb,module=65080000,type=2,res=(nil))
08d06360:Ret  PE DLL (proc=0x6509f2bb,module=65080000,type=2,res=(nil)) retval=1
08d06360:Call PE DLL (proc=0x657820d0,module=65780000,type=2,res=(nil))
08d06360:Ret  PE DLL (proc=0x657820d0,module=65780000,type=2,res=(nil)) retval=1
08d06360:Call PE DLL (proc=0x65943315,module=65940000,type=2,res=(nil))
08d06360:Ret  PE DLL (proc=0x65943315,module=65940000,type=2,res=(nil)) retval=1
08d06360:Call PE DLL (proc=0x65f21fcb,module=65f00000,type=2,res=(nil))
08d06360:Ret  PE DLL (proc=0x65f21fcb,module=65f00000,type=2,res=(nil)) retval=1
08d06360:Call PE DLL (proc=0x10005fd2,module=10000000,type=2,res=(nil))
08d06360:Ret  PE DLL (proc=0x10005fd2,module=10000000,type=2,res=(nil)) retval=1
08d06360:Call PE DLL (proc=0x40a4c3d0,module=40a40000,type=2,res=(nil))
08d06360:Ret  PE DLL (proc=0x40a4c3d0,module=40a40000,type=2,res=(nil)) retval=1
08d06360:Call PE DLL (proc=0x6534d03b,module=65340000,type=2,res=(nil))
08d06360:Ret  PE DLL (proc=0x6534d03b,module=65340000,type=2,res=(nil)) retval=1
08d06360:Call PE DLL (proc=0x701015a4,module=70100000,type=2,res=(nil))
08d06360:Ret  PE DLL (proc=0x701015a4,module=70100000,type=2,res=(nil)) retval=1
08d06360:Call PE DLL (proc=0x7f9617fd,module=7f960000,type=2,res=(nil))
08d06360:Ret  PE DLL (proc=0x7f9617fd,module=7f960000,type=2,res=(nil)) retval=1
08d06360:Call PE DLL (proc=0x70201631,module=70200000,type=2,res=(nil))
08d06360:Ret  PE DLL (proc=0x70201631,module=70200000,type=2,res=(nil)) retval=1
08d06360:Call PE DLL (proc=0x428a800a,module=428a7000,type=2,res=(nil))
08d06360:Ret  PE DLL (proc=0x428a800a,module=428a7000,type=2,res=(nil)) retval=1
08d06360:Call PE DLL (proc=0x655c15f0,module=655c0000,type=2,res=(nil))
08d06360:Ret  PE DLL (proc=0x655c15f0,module=655c0000,type=2,res=(nil)) retval=1
08d06360:Call PE DLL (proc=0x6510fe71,module=65100000,type=2,res=(nil))
08d06360:Ret  PE DLL (proc=0x6510fe71,module=65100000,type=2,res=(nil)) retval=1
08d06360:Call PE DLL (proc=0x7f841536,module=7f840000,type=2,res=(nil))
08d06360:Ret  PE DLL (proc=0x7f841536,module=7f840000,type=2,res=(nil)) retval=1
08d06360:Call PE DLL (proc=0x7f99102a,module=7f990000,type=2,res=(nil))
08d06360:Ret  PE DLL (proc=0x7f99102a,module=7f990000,type=2,res=(nil)) retval=1
08d06360:Call PE DLL (proc=0x7fb41269,module=7fb40000,type=2,res=(nil))
08d06360:Ret  PE DLL (proc=0x7fb41269,module=7fb40000,type=2,res=(nil)) retval=1
08d06360:Call PE DLL (proc=0x7fb0195c,module=7fb00000,type=2,res=(nil))
08d06360:Ret  PE DLL (proc=0x7fb0195c,module=7fb00000,type=2,res=(nil)) retval=1
08d06360:Call PE DLL (proc=0x7f951603,module=7f950000,type=2,res=(nil))
08d06360:Ret  PE DLL (proc=0x7f951603,module=7f950000,type=2,res=(nil)) retval=1
08d06360:Call PE DLL (proc=0x7fc310d9,module=7fc30000,type=2,res=(nil))
08d06360:Ret  PE DLL (proc=0x7fc310d9,module=7fc30000,type=2,res=(nil)) retval=1
08d06360:Call PE DLL (proc=0x7f8758af,module=7f870000,type=2,res=(nil))
08d06360:Ret  PE DLL (proc=0x7f8758af,module=7f870000,type=2,res=(nil)) retval=1
08d06360:Call PE DLL (proc=0x42e88a2c,module=42e83000,type=2,res=(nil))
08d06360:Ret  PE DLL (proc=0x42e88a2c,module=42e83000,type=2,res=(nil)) retval=1
08d06360:Call PE DLL (proc=0x7f881356,module=7f880000,type=2,res=(nil))
08d06360:Ret  PE DLL (proc=0x7f881356,module=7f880000,type=2,res=(nil)) retval=1
08d06360:Call PE DLL (proc=0x603016bb,module=60300000,type=2,res=(nil))
08d06360:Ret  PE DLL (proc=0x603016bb,module=60300000,type=2,res=(nil)) retval=1
08d06360:Call PE DLL (proc=0x70291483,module=70290000,type=2,res=(nil))
08d06360:Call kernel32.HeapAlloc(40380000,00000000,00000028) ret=7029181a
08d06360:Ret  kernel32.HeapAlloc() retval=441ae1dc ret=7029181a
08d06360:Ret  PE DLL (proc=0x70291483,module=70290000,type=2,res=(nil)) retval=1
08d06360:Call PE DLL (proc=0x6600e0e0,module=66000000,type=2,res=(nil))
08d06360:Ret  PE DLL (proc=0x6600e0e0,module=66000000,type=2,res=(nil)) retval=1
08d06360:Call PE DLL (proc=0x3000e449,module=30000000,type=2,res=(nil))
08d06360:Call kernel32.GlobalAlloc(00000040,000095b6) ret=300011ca
08d06360:Ret  kernel32.GlobalAlloc() retval=441ae210 ret=300011ca
08d06360:Call kernel32.lstrcpyA(441ae280,30015d10 "Extract Progress") ret=300011a3
08d06360:Ret  kernel32.lstrcpyA() retval=441ae280 ret=300011a3
08d06360:Ret  PE DLL (proc=0x3000e449,module=30000000,type=2,res=(nil)) retval=1
08d06360:Call PE DLL (proc=0x6c00868a,module=6c000000,type=2,res=(nil))
08d06360:Ret  PE DLL (proc=0x6c00868a,module=6c000000,type=2,res=(nil)) retval=1
08d06360:Call PE DLL (proc=0x70c31dea,module=70c30000,type=2,res=(nil))
08d06360:Ret  PE DLL (proc=0x70c31dea,module=70c30000,type=2,res=(nil)) retval=1
08d06360:Call kernel32.GetCurrentThreadId() ret=78002476
08d06360:Ret  kernel32.GetCurrentThreadId() retval=08d06360 ret=78002476
08d06360:Call kernel32.GetTickCount() ret=6c1145a0
08d06360:Ret  kernel32.GetTickCount() retval=0001b1be ret=6c1145a0
08d06360:Call kernel32.CreateEventA(00000000,00000001,00000000,00000000) ret=6c1145d5
08d06360:Ret  kernel32.CreateEventA() retval=00000338 ret=6c1145d5
08d06360:Call kernel32.GetTickCount() ret=6c1145f3
08d06360:Ret  kernel32.GetTickCount() retval=0001b1be ret=6c1145f3
08d06360:Call kernel32.ClearCommError(00000328,44536214,44536230) ret=6c1146e6
trace:comm:ClearCommError handle 808 cbInQue = 0 cbOutQue = 0
08d06360:Ret  kernel32.ClearCommError() retval=00000001 ret=6c1146e6
08d06360:Call kernel32.ResetEvent(00000338) ret=6c11472d
08d06360:Ret  kernel32.ResetEvent() retval=00000001 ret=6c11472d
08d06360:Call kernel32.ReadFile(00000328,4453623c,00000c80,44536208,4453621c) ret=6c11474a
trace:file:ReadFile 808 0x4453623c 3200 0x44536208 0x4453621c
FIXME:pthread_rwlock_rdlock
FIXME:pthread_rwlock_unlock
trace:file:FILE_SetDosError errno = 11 Resource temporarily unavailable
08d06360:Ret  kernel32.ReadFile() retval=00000000 ret=6c11474a
08d06360:Call kernel32.GetLastError() ret=6c114754
08d06360:Ret  kernel32.GetLastError() retval=00000020 ret=6c114754
08d06360:Call kernel32.GetLastError() ret=6c1147c5
08d06360:Ret  kernel32.GetLastError() retval=00000020 ret=6c1147c5
08d06360:Call kernel32.Sleep(00000001) ret=6c1106ce
08d06360:Ret  kernel32.Sleep() retval=00000102 ret=6c1106ce
08d06360:Call kernel32.Sleep(00000001) ret=6c1106ce
08d06360:Ret  kernel32.Sleep() retval=00000102 ret=6c1106ce
08d06360:Call kernel32.GetTickCount() ret=6c1145f3
08d06360:Ret  kernel32.GetTickCount() retval=0001b1c1 ret=6c1145f3
08d06360:Call kernel32.GetCommModemStatus(00000328,44536210) ret=6c114615
trace:comm:GetCommModemStatus 4126 -> MS_DSR_ON MS_CTS_ON 
08d06360:Ret  kernel32.GetCommModemStatus() retval=00000001 ret=6c114615
08d06360:Call kernel32.ClearCommError(00000328,44536214,44536230) ret=6c1146e6
trace:comm:ClearCommError handle 808 cbInQue = 0 cbOutQue = 0
08d06360:Ret  kernel32.ClearCommError() retval=00000001 ret=6c1146e6
08d06360:Call kernel32.ResetEvent(00000338) ret=6c11472d
08d06360:Ret  kernel32.ResetEvent() retval=00000001 ret=6c11472d
08d06360:Call kernel32.ReadFile(00000328,4453623c,00000c80,44536208,4453621c) ret=6c11474a
trace:file:ReadFile 808 0x4453623c 3200 0x44536208 0x4453621c
FIXME:pthread_rwlock_rdlock
FIXME:pthread_rwlock_unlock
trace:file:FILE_SetDosError errno = 11 Resource temporarily unavailable
08d06360:Ret  kernel32.ReadFile() retval=00000000 ret=6c11474a
08d06360:Call kernel32.GetLastError() ret=6c114754
08d06360:Ret  kernel32.GetLastError() retval=00000020 ret=6c114754
08d06360:Call kernel32.GetLastError() ret=6c1147c5
08d06360:Ret  kernel32.GetLastError() retval=00000020 ret=6c1147c5
08d06360:Call kernel32.Sleep(00000001) ret=6c1106ce
08d06360:Ret  kernel32.Sleep() retval=00000102 ret=6c1106ce
08d06360:Call kernel32.Sleep(00000001) ret=6c1106ce
08d06360:Ret  kernel32.Sleep() retval=00000102 ret=6c1106ce
08d06360:Call kernel32.GetTickCount() ret=6c1145f3
08d06360:Ret  kernel32.GetTickCount() retval=0001b1c3 ret=6c1145f3
08d06360:Call kernel32.ClearCommError(00000328,44536214,44536230) ret=6c1146e6
trace:comm:ClearCommError handle 808 cbInQue = 0 cbOutQue = 0
08d06360:Ret  kernel32.ClearCommError() retval=00000001 ret=6c1146e6
08d06360:Call kernel32.ResetEvent(00000338) ret=6c11472d
08d06360:Ret  kernel32.ResetEvent() retval=00000001 ret=6c11472d
08d06360:Call kernel32.ReadFile(00000328,4453623c,00000c80,44536208,4453621c) ret=6c11474a
trace:file:ReadFile 808 0x4453623c 3200 0x44536208 0x4453621c
FIXME:pthread_rwlock_rdlock
FIXME:pthread_rwlock_unlock
trace:file:FILE_SetDosError errno = 11 Resource temporarily unavailable
08d06360:Ret  kernel32.ReadFile() retval=00000000 ret=6c11474a
08d06360:Call kernel32.GetLastError() ret=6c114754
08d06360:Ret  kernel32.GetLastError() retval=00000020 ret=6c114754
08d06360:Call kernel32.GetLastError() ret=6c1147c5
08d06360:Ret  kernel32.GetLastError() retval=00000020 ret=6c1147c5
08d06360:Call kernel32.Sleep(00000001) ret=6c1106ce
08d06360:Ret  kernel32.Sleep() retval=00000102 ret=6c1106ce
08d06360:Call kernel32.Sleep(00000001) ret=6c1106ce
08d06360:Ret  kernel32.Sleep() retval=00000102 ret=6c1106ce
08d06360:Call kernel32.GetTickCount() ret=6c1145f3
08d06360:Ret  kernel32.GetTickCount() retval=0001b1c6 ret=6c1145f3
08d06360:Call kernel32.ClearCommError(00000328,44536214,44536230) ret=6c1146e6
trace:comm:ClearCommError handle 808 cbInQue = 0 cbOutQue = 0
08d06360:Ret  kernel32.ClearCommError() retval=00000001 ret=6c1146e6
08d06360:Call kernel32.ResetEvent(00000338) ret=6c11472d
08d06360:Ret  kernel32.ResetEvent() retval=00000001 ret=6c11472d
08d06360:Call kernel32.ReadFile(00000328,4453623c,00000c80,44536208,4453621c) ret=6c11474a
trace:file:ReadFile 808 0x4453623c 3200 0x44536208 0x4453621c
FIXME:pthread_rwlock_rdlock
FIXME:pthread_rwlock_unlock
trace:file:FILE_SetDosError errno = 11 Resource temporarily unavailable
08d06360:Ret  kernel32.ReadFile() retval=00000000 ret=6c11474a
08d06360:Call kernel32.GetLastError() ret=6c114754
08d06360:Ret  kernel32.GetLastError() retval=00000020 ret=6c114754
08d06360:Call kernel32.GetLastError() ret=6c1147c5
08d06360:Ret  kernel32.GetLastError() retval=00000020 ret=6c1147c5
08d06360:Call kernel32.Sleep(00000001) ret=6c1106ce
08d06360:Ret  kernel32.Sleep() retval=00000102 ret=6c1106ce
08d06360:Call kernel32.Sleep(00000001) ret=6c1106ce
08d06360:Ret  kernel32.Sleep() retval=00000102 ret=6c1106ce
08d06360:Call kernel32.GetTickCount() ret=6c1145f3
08d06360:Ret  kernel32.GetTickCount() retval=0001b1c8 ret=6c1145f3
08d06360:Call kernel32.ClearCommError(00000328,44536214,44536230) ret=6c1146e6
trace:comm:ClearCommError handle 808 cbInQue = 0 cbOutQue = 0
08d06360:Ret  kernel32.ClearCommError() retval=00000001 ret=6c1146e6
08d06360:Call kernel32.ResetEvent(00000338) ret=6c11472d
08d06360:Ret  kernel32.ResetEvent() retval=00000001 ret=6c11472d
08d06360:Call kernel32.ReadFile(00000328,4453623c,00000c80,44536208,4453621c) ret=6c11474a
trace:file:ReadFile 808 0x4453623c 3200 0x44536208 0x4453621c
FIXME:pthread_rwlock_rdlock
FIXME:pthread_rwlock_unlock
trace:file:FILE_SetDosError errno = 11 Resource temporarily unavailable
08d06360:Ret  kernel32.ReadFile() retval=00000000 ret=6c11474a
08d06360:Call kernel32.GetLastError() ret=6c114754
08d06360:Ret  kernel32.GetLastError() retval=00000020 ret=6c114754
08d06360:Call kernel32.GetLastError() ret=6c1147c5
08d06360:Ret  kernel32.GetLastError() retval=00000020 ret=6c1147c5
08d06360:Call kernel32.Sleep(00000001) ret=6c1106ce
08d06360:Ret  kernel32.Sleep() retval=00000102 ret=6c1106ce
08d06360:Call kernel32.Sleep(00000001) ret=6c1106ce
08d06360:Ret  kernel32.Sleep() retval=00000102 ret=6c1106ce
08d06360:Call kernel32.GetTickCount() ret=6c1145f3
08d06360:Ret  kernel32.GetTickCount() retval=0001b1cb ret=6c1145f3
08d06360:Call kernel32.ClearCommError(00000328,44536214,44536230) ret=6c1146e6
trace:comm:ClearCommError handle 808 cbInQue = 0 cbOutQue = 0
08d06360:Ret  kernel32.ClearCommError() retval=00000001 ret=6c1146e6
08d06360:Call kernel32.ResetEvent(00000338) ret=6c11472d
08d06360:Ret  kernel32.ResetEvent() retval=00000001 ret=6c11472d
08d06360:Call kernel32.ReadFile(00000328,4453623c,00000c80,44536208,4453621c) ret=6c11474a
trace:file:ReadFile 808 0x4453623c 3200 0x44536208 0x4453621c
FIXME:pthread_rwlock_rdlock
FIXME:pthread_rwlock_unlock
trace:file:FILE_SetDosError errno = 11 Resource temporarily unavailable

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