Videre

linedance-app/venv/lib/python3.12/site-packages/numba/cuda/cudadrv/runtime.py

@@ -0,0 +1,142 @@
+"""
+CUDA Runtime wrapper.
+
+This provides a very minimal set of bindings, since the Runtime API is not
+really used in Numba except for querying the Runtime version.
+"""
+
+import ctypes
+import functools
+import sys
+
+from numba.core import config
+from numba.cuda.cudadrv.driver import ERROR_MAP, make_logger
+from numba.cuda.cudadrv.error import CudaSupportError, CudaRuntimeError
+from numba.cuda.cudadrv.libs import open_cudalib
+from numba.cuda.cudadrv.rtapi import API_PROTOTYPES
+from numba.cuda.cudadrv import enums
+
+
+class CudaRuntimeAPIError(CudaRuntimeError):
+    """
+    Raised when there is an error accessing a C API from the CUDA Runtime.
+    """
+    def __init__(self, code, msg):
+        self.code = code
+        self.msg = msg
+        super().__init__(code, msg)
+
+    def __str__(self):
+        return "[%s] %s" % (self.code, self.msg)
+
+
+class Runtime:
+    """
+    Runtime object that lazily binds runtime API functions.
+    """
+
+    def __init__(self):
+        self.is_initialized = False
+
+    def _initialize(self):
+        # lazily initialize logger
+        global _logger
+        _logger = make_logger()
+
+        if config.DISABLE_CUDA:
+            msg = ("CUDA is disabled due to setting NUMBA_DISABLE_CUDA=1 "
+                   "in the environment, or because CUDA is unsupported on "
+                   "32-bit systems.")
+            raise CudaSupportError(msg)
+        self.lib = open_cudalib('cudart')
+
+        self.is_initialized = True
+
+    def __getattr__(self, fname):
+        # First request of a runtime API function
+        try:
+            proto = API_PROTOTYPES[fname]
+        except KeyError:
+            raise AttributeError(fname)
+        restype = proto[0]
+        argtypes = proto[1:]
+
+        if not self.is_initialized:
+            self._initialize()
+
+        # Find function in runtime library
+        libfn = self._find_api(fname)
+        libfn.restype = restype
+        libfn.argtypes = argtypes
+
+        safe_call = self._wrap_api_call(fname, libfn)
+        setattr(self, fname, safe_call)
+        return safe_call
+
+    def _wrap_api_call(self, fname, libfn):
+        @functools.wraps(libfn)
+        def safe_cuda_api_call(*args):
+            _logger.debug('call runtime api: %s', libfn.__name__)
+            retcode = libfn(*args)
+            self._check_error(fname, retcode)
+        return safe_cuda_api_call
+
+    def _check_error(self, fname, retcode):
+        if retcode != enums.CUDA_SUCCESS:
+            errname = ERROR_MAP.get(retcode, "cudaErrorUnknown")
+            msg = "Call to %s results in %s" % (fname, errname)
+            _logger.error(msg)
+            raise CudaRuntimeAPIError(retcode, msg)
+
+    def _find_api(self, fname):
+        try:
+            return getattr(self.lib, fname)
+        except AttributeError:
+            pass
+
+        # Not found.
+        # Delay missing function error to use
+        def absent_function(*args, **kws):
+            msg = "runtime missing function: %s."
+            raise CudaRuntimeError(msg % fname)
+
+        setattr(self, fname, absent_function)
+        return absent_function
+
+    def get_version(self):
+        """
+        Returns the CUDA Runtime version as a tuple (major, minor).
+        """
+        rtver = ctypes.c_int()
+        self.cudaRuntimeGetVersion(ctypes.byref(rtver))
+        # The version is encoded as (1000 * major) + (10 * minor)
+        major = rtver.value // 1000
+        minor = (rtver.value - (major * 1000)) // 10
+        return (major, minor)
+
+    def is_supported_version(self):
+        """
+        Returns True if the CUDA Runtime is a supported version.
+        """
+
+        return self.get_version() in self.supported_versions
+
+    @property
+    def supported_versions(self):
+        """A tuple of all supported CUDA toolkit versions. Versions are given in
+        the form ``(major_version, minor_version)``."""
+        if sys.platform not in ('linux', 'win32') or config.MACHINE_BITS != 64:
+            # Only 64-bit Linux and Windows are supported
+            return ()
+        return ((11, 0), (11, 1), (11, 2), (11, 3), (11, 4), (11, 5), (11, 6),
+                (11, 7))
+
+
+runtime = Runtime()
+
+
+def get_version():
+    """
+    Return the runtime version as a tuple of (major, minor)
+    """
+    return runtime.get_version()