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Diffstat (limited to 'src/gallium/drivers/swr/rasterizer/scripts/mako/cache.py')
| -rw-r--r-- | src/gallium/drivers/swr/rasterizer/scripts/mako/cache.py | 238 |
1 files changed, 238 insertions, 0 deletions
diff --git a/src/gallium/drivers/swr/rasterizer/scripts/mako/cache.py b/src/gallium/drivers/swr/rasterizer/scripts/mako/cache.py new file mode 100644 index 00000000000..c405c5171d7 --- /dev/null +++ b/src/gallium/drivers/swr/rasterizer/scripts/mako/cache.py @@ -0,0 +1,238 @@ +# mako/cache.py +# Copyright (C) 2006-2015 the Mako authors and contributors <see AUTHORS file> +# +# This module is part of Mako and is released under +# the MIT License: http://www.opensource.org/licenses/mit-license.php + +from mako import compat, util + +_cache_plugins = util.PluginLoader("mako.cache") + +register_plugin = _cache_plugins.register +register_plugin("beaker", "mako.ext.beaker_cache", "BeakerCacheImpl") + + +class Cache(object): + """Represents a data content cache made available to the module + space of a specific :class:`.Template` object. + + .. versionadded:: 0.6 + :class:`.Cache` by itself is mostly a + container for a :class:`.CacheImpl` object, which implements + a fixed API to provide caching services; specific subclasses exist to + implement different + caching strategies. Mako includes a backend that works with + the Beaker caching system. Beaker itself then supports + a number of backends (i.e. file, memory, memcached, etc.) + + The construction of a :class:`.Cache` is part of the mechanics + of a :class:`.Template`, and programmatic access to this + cache is typically via the :attr:`.Template.cache` attribute. + + """ + + impl = None + """Provide the :class:`.CacheImpl` in use by this :class:`.Cache`. + + This accessor allows a :class:`.CacheImpl` with additional + methods beyond that of :class:`.Cache` to be used programmatically. + + """ + + id = None + """Return the 'id' that identifies this cache. + + This is a value that should be globally unique to the + :class:`.Template` associated with this cache, and can + be used by a caching system to name a local container + for data specific to this template. + + """ + + starttime = None + """Epochal time value for when the owning :class:`.Template` was + first compiled. + + A cache implementation may wish to invalidate data earlier than + this timestamp; this has the effect of the cache for a specific + :class:`.Template` starting clean any time the :class:`.Template` + is recompiled, such as when the original template file changed on + the filesystem. + + """ + + def __init__(self, template, *args): + # check for a stale template calling the + # constructor + if isinstance(template, compat.string_types) and args: + return + self.template = template + self.id = template.module.__name__ + self.starttime = template.module._modified_time + self._def_regions = {} + self.impl = self._load_impl(self.template.cache_impl) + + def _load_impl(self, name): + return _cache_plugins.load(name)(self) + + def get_or_create(self, key, creation_function, **kw): + """Retrieve a value from the cache, using the given creation function + to generate a new value.""" + + return self._ctx_get_or_create(key, creation_function, None, **kw) + + def _ctx_get_or_create(self, key, creation_function, context, **kw): + """Retrieve a value from the cache, using the given creation function + to generate a new value.""" + + if not self.template.cache_enabled: + return creation_function() + + return self.impl.get_or_create( + key, + creation_function, + **self._get_cache_kw(kw, context)) + + def set(self, key, value, **kw): + """Place a value in the cache. + + :param key: the value's key. + :param value: the value. + :param \**kw: cache configuration arguments. + + """ + + self.impl.set(key, value, **self._get_cache_kw(kw, None)) + + put = set + """A synonym for :meth:`.Cache.set`. + + This is here for backwards compatibility. + + """ + + def get(self, key, **kw): + """Retrieve a value from the cache. + + :param key: the value's key. + :param \**kw: cache configuration arguments. The + backend is configured using these arguments upon first request. + Subsequent requests that use the same series of configuration + values will use that same backend. + + """ + return self.impl.get(key, **self._get_cache_kw(kw, None)) + + def invalidate(self, key, **kw): + """Invalidate a value in the cache. + + :param key: the value's key. + :param \**kw: cache configuration arguments. The + backend is configured using these arguments upon first request. + Subsequent requests that use the same series of configuration + values will use that same backend. + + """ + self.impl.invalidate(key, **self._get_cache_kw(kw, None)) + + def invalidate_body(self): + """Invalidate the cached content of the "body" method for this + template. + + """ + self.invalidate('render_body', __M_defname='render_body') + + def invalidate_def(self, name): + """Invalidate the cached content of a particular ``<%def>`` within this + template. + + """ + + self.invalidate('render_%s' % name, __M_defname='render_%s' % name) + + def invalidate_closure(self, name): + """Invalidate a nested ``<%def>`` within this template. + + Caching of nested defs is a blunt tool as there is no + management of scope -- nested defs that use cache tags + need to have names unique of all other nested defs in the + template, else their content will be overwritten by + each other. + + """ + + self.invalidate(name, __M_defname=name) + + def _get_cache_kw(self, kw, context): + defname = kw.pop('__M_defname', None) + if not defname: + tmpl_kw = self.template.cache_args.copy() + tmpl_kw.update(kw) + elif defname in self._def_regions: + tmpl_kw = self._def_regions[defname] + else: + tmpl_kw = self.template.cache_args.copy() + tmpl_kw.update(kw) + self._def_regions[defname] = tmpl_kw + if context and self.impl.pass_context: + tmpl_kw = tmpl_kw.copy() + tmpl_kw.setdefault('context', context) + return tmpl_kw + + +class CacheImpl(object): + """Provide a cache implementation for use by :class:`.Cache`.""" + + def __init__(self, cache): + self.cache = cache + + pass_context = False + """If ``True``, the :class:`.Context` will be passed to + :meth:`get_or_create <.CacheImpl.get_or_create>` as the name ``'context'``. + """ + + def get_or_create(self, key, creation_function, **kw): + """Retrieve a value from the cache, using the given creation function + to generate a new value. + + This function *must* return a value, either from + the cache, or via the given creation function. + If the creation function is called, the newly + created value should be populated into the cache + under the given key before being returned. + + :param key: the value's key. + :param creation_function: function that when called generates + a new value. + :param \**kw: cache configuration arguments. + + """ + raise NotImplementedError() + + def set(self, key, value, **kw): + """Place a value in the cache. + + :param key: the value's key. + :param value: the value. + :param \**kw: cache configuration arguments. + + """ + raise NotImplementedError() + + def get(self, key, **kw): + """Retrieve a value from the cache. + + :param key: the value's key. + :param \**kw: cache configuration arguments. + + """ + raise NotImplementedError() + + def invalidate(self, key, **kw): + """Invalidate a value in the cache. + + :param key: the value's key. + :param \**kw: cache configuration arguments. + + """ + raise NotImplementedError() |