Acpi_has_method of kernel ACPI function API,

Acpi_has_method of kernel ACPI function API,

Acpi_has_method of kernel ACPI function API

Acpi_has_method (acpi_handle handle, char * name) is used to determine whether handle provides the method specified by the name parameter. The example is as follows: if (! Acpi_has_method (adev-> handle, "_ DEP") return false. For example, this example judges that adev-> handle provides the _ DEP function. The source code analysis is as follows: bool acpi_has_method (acpi_handle handle, char * name) {acpi_handle tmp; # the original method is to query whether the handler contains the name function through acpi_get_handle, and confirm the return value through acpi_get_handle, 0 # indicates containing this function return ACPI_SUCCESS (acpi_get_handle (handle, name, & tmp);} Where # define ACPI_SUCCESS ()(! ())