diff options
| author | Michael Plante <michael.plante@gmail.com> | 2010-01-22 19:58:40 -0600 |
|---|---|---|
| committer | Pete Batard <pbatard@gmail.com> | 2010-01-23 22:16:35 +0000 |
| commit | 6b34ff4ed72e3c52b4c927946b4fb0a233c24044 (patch) | |
| tree | 8b2d750c11ae7c816c0c6522cc80599f9b572d75 /libusb/os/windows_compat.c | |
| parent | c7fa44ff83cba5d58c058510fced820fab906332 (diff) | |
| download | libusb-6b34ff4ed72e3c52b4c927946b4fb0a233c24044.tar.gz | |
r104: thread safety change for pipe_number global
Signed-off-by: Michael Plante <michael.plante@gmail.com>
Diffstat (limited to 'libusb/os/windows_compat.c')
| -rw-r--r-- | libusb/os/windows_compat.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/libusb/os/windows_compat.c b/libusb/os/windows_compat.c index a7f68d2..677d2ba 100644 --- a/libusb/os/windows_compat.c +++ b/libusb/os/windows_compat.c @@ -132,7 +132,7 @@ struct { // globals BOOLEAN is_polling_set = FALSE; -unsigned short pipe_number = 0; +LONG pipe_number = 0; // Init void init_polling(void) @@ -270,6 +270,7 @@ int pipe_for_poll(int filedes[2]) HANDLE handle[2]; OVERLAPPED *overlapped0, *overlapped1; char pipe_name[] = "\\\\.\\pipe\\libusb000000000000"; + LONG our_pipe_number; CHECK_INIT_POLLING; @@ -284,7 +285,9 @@ int pipe_for_poll(int filedes[2]) return -1; } - _snprintf(pipe_name, sizeof(pipe_name), "\\\\.\\pipe\\libusb%08x%04x", (unsigned)GetCurrentProcessId(), pipe_number++); + our_pipe_number = InterlockedIncrement(&pipe_number) - 1; // - 1 to mirror postfix operation inside _snprintf + our_pipe_number &= 0xFFFF; // Could warn if this was necessary (ToDo) + _snprintf(pipe_name, sizeof(pipe_name), "\\\\.\\pipe\\libusb%08x%04x", (unsigned)GetCurrentProcessId(), our_pipe_number); // Read end of the pipe handle[0] = CreateNamedPipeA(pipe_name, PIPE_ACCESS_INBOUND|FILE_FLAG_OVERLAPPED, |