components/utilities/utlock.c

165  * PARAMETERS:  Lock                - Pointer to a valid RW lock
175     ACPI_RW_LOCK            *Lock)
180     Lock->NumReaders = 0;
181     Status = AcpiOsCreateMutex (&Lock->ReaderMutex);
187     Status = AcpiOsCreateMutex (&Lock->WriterMutex);
194     ACPI_RW_LOCK            *Lock)
197     AcpiOsDeleteMutex (Lock->ReaderMutex);
198     AcpiOsDeleteMutex (Lock->WriterMutex);
200     Lock->NumReaders = 0;
201     Lock->ReaderMutex = NULL;
202     Lock->WriterMutex = NULL;
211  * PARAMETERS:  Lock                - Pointer to a valid RW lock
226     ACPI_RW_LOCK            *Lock)
231     Status = AcpiOsAcquireMutex (Lock->ReaderMutex, ACPI_WAIT_FOREVER);
239     Lock->NumReaders++;
240     if (Lock->NumReaders == 1)
242         Status = AcpiOsAcquireMutex (Lock->WriterMutex, ACPI_WAIT_FOREVER);
245     AcpiOsReleaseMutex (Lock->ReaderMutex);
252     ACPI_RW_LOCK            *Lock)
257     Status = AcpiOsAcquireMutex (Lock->ReaderMutex, ACPI_WAIT_FOREVER);
265     Lock->NumReaders--;
266     if (Lock->NumReaders == 0)
268         AcpiOsReleaseMutex (Lock->WriterMutex);
271     AcpiOsReleaseMutex (Lock->ReaderMutex);
281  * PARAMETERS:  Lock                - Pointer to a valid RW lock
294     ACPI_RW_LOCK            *Lock)
299     Status = AcpiOsAcquireMutex (Lock->WriterMutex, ACPI_WAIT_FOREVER);
306     ACPI_RW_LOCK            *Lock)
309     AcpiOsReleaseMutex (Lock->WriterMutex);