mirror of
https://github.com/mozilla/gecko-dev.git
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294 lines
8.5 KiB
Python
294 lines
8.5 KiB
Python
# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this
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# file, You can obtain one at http://mozilla.org/MPL/2.0/.
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# NOTE: Although this generates headers and code for C++, using Services.h
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# is deprecated in favour of Components.h. This system is currently only
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# used for generating services.rs (until a Rust version of Components.h is
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# is written and this can be completely deleted).
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import buildconfig
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services = []
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def service(name, iface, contractid):
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"""Define a convenient service getter"""
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services.append((name, iface, contractid))
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# The `name` parameter is derived from the `iface` by removing the `nsI`
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# prefix. (This often matches the `contractid`, but not always.) The only
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# exceptions are when that would result in a misleading name, e.g. for
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# "@mozilla.org/file/directory_service;1".
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service("ChromeRegistry", "nsIChromeRegistry", "@mozilla.org/chrome/chrome-registry;1")
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service(
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"ToolkitChromeRegistry",
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"nsIToolkitChromeRegistry",
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"@mozilla.org/chrome/chrome-registry;1",
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)
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service(
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"XULChromeRegistry", "nsIXULChromeRegistry", "@mozilla.org/chrome/chrome-registry;1"
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)
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service("DirectoryService", "nsIProperties", "@mozilla.org/file/directory_service;1"),
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service("IOService", "nsIIOService", "@mozilla.org/network/io-service;1")
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service("ObserverService", "nsIObserverService", "@mozilla.org/observer-service;1")
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service(
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"StringBundleService", "nsIStringBundleService", "@mozilla.org/intl/stringbundle;1"
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)
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service("PermissionManager", "nsIPermissionManager", "@mozilla.org/permissionmanager;1")
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service("PrefService", "nsIPrefService", "@mozilla.org/preferences-service;1")
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service(
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"ServiceWorkerManager",
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"nsIServiceWorkerManager",
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"@mozilla.org/serviceworkers/manager;1",
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)
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service(
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"AsyncShutdownService",
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"nsIAsyncShutdownService",
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"@mozilla.org/async-shutdown-service;1",
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)
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service("UUIDGenerator", "nsIUUIDGenerator", "@mozilla.org/uuid-generator;1")
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service("GfxInfo", "nsIGfxInfo", "@mozilla.org/gfx/info;1")
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service(
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"SocketTransportService",
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"nsISocketTransportService",
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"@mozilla.org/network/socket-transport-service;1",
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)
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service(
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"StreamTransportService",
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"nsIStreamTransportService",
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"@mozilla.org/network/stream-transport-service;1",
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)
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service(
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"CacheStorageService",
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"nsICacheStorageService",
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"@mozilla.org/netwerk/cache-storage-service;1",
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)
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service("URIClassifier", "nsIURIClassifier", "@mozilla.org/uriclassifierservice")
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service(
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"HttpActivityDistributor",
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"nsIHttpActivityDistributor",
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"@mozilla.org/network/http-activity-distributor;1",
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)
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service("History", "mozilla::IHistory", "@mozilla.org/browser/history;1")
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service("ThirdPartyUtil", "mozIThirdPartyUtil", "@mozilla.org/thirdpartyutil;1")
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service("URIFixup", "nsIURIFixup", "@mozilla.org/docshell/uri-fixup;1")
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service("Bits", "nsIBits", "@mozilla.org/bits;1")
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service(
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"MemoryReporterManager",
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"nsIMemoryReporterManager",
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"@mozilla.org/memory-reporter-manager;1",
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)
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# If you want nsIXULAppInfo, as returned by Services.jsm, you need to call:
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#
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# nsCOMPtr<nsIXULRuntime> runtime = mozilla::services::GetXULRuntime();
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# nsCOMPtr<nsIXULAppInfo> appInfo = do_QueryInterface(runtime);
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#
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# for C++ or:
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#
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# let appInfo =
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# get_XULRuntime().and_then(|p| p.query_interface::<nsIXULAppInfo>());
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#
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# for Rust. Note that not all applications (e.g. xpcshell) implement
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# nsIXULAppInfo.
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service("XULRuntime", "nsIXULRuntime", "@mozilla.org/xre/app-info;1")
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if buildconfig.substs.get("ENABLE_WEBDRIVER"):
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service("RemoteAgent", "nsIRemoteAgent", "@mozilla.org/remote/agent;1")
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# The definition file needs access to the definitions of the particular
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# interfaces. If you add a new interface here, make sure the necessary includes
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# are also listed in the following code snippet.
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CPP_INCLUDES = """
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#include "mozilla/Likely.h"
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#include "mozilla/Services.h"
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#include "mozIThirdPartyUtil.h"
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#include "nsComponentManager.h"
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#include "nsIObserverService.h"
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#include "nsNetCID.h"
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#include "nsObserverService.h"
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#include "nsXPCOMPrivate.h"
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#include "nsIIOService.h"
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#include "nsIDirectoryService.h"
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#include "nsIChromeRegistry.h"
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#include "nsIStringBundle.h"
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#include "nsIToolkitChromeRegistry.h"
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#include "IHistory.h"
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#include "nsIXPConnect.h"
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#include "nsIPermissionManager.h"
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#include "nsIPrefService.h"
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#include "nsIServiceWorkerManager.h"
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#include "nsICacheStorageService.h"
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#include "nsIStreamTransportService.h"
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#include "nsISocketTransportService.h"
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#include "nsIURIClassifier.h"
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#include "nsIHttpActivityObserver.h"
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#include "nsIAsyncShutdown.h"
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#include "nsIUUIDGenerator.h"
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#include "nsIGfxInfo.h"
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#include "nsIURIFixup.h"
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#include "nsIBits.h"
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#include "nsIXULRuntime.h"
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"""
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if buildconfig.substs.get("ENABLE_WEBDRIVER"):
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CPP_INCLUDES += '#include "nsIRemoteAgent.h"'
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#####
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# Codegen Logic
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#
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# The following code consumes the data listed above to generate the files
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# Services.h, Services.cpp, and services.rs which provide access to these
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# service getters in both rust and C++ code.
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#
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# XXX(nika): would it be a good idea to unify Services.jsm into here too?
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def services_h(output):
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output.write(
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"""\
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/* THIS FILE IS GENERATED BY Services.py - DO NOT EDIT */
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#ifndef mozilla_Services_h
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#define mozilla_Services_h
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#include "nscore.h"
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#include "nsCOMPtr.h"
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"""
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)
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for (name, iface, contractid) in services:
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# Write out a forward declaration for the type in question
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segs = iface.split("::")
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for namespace in segs[:-1]:
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output.write("namespace %s {\n" % namespace)
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output.write("class %s;\n" % segs[-1])
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for namespace in reversed(segs[:-1]):
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output.write("} // namespace %s\n" % namespace)
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# Write out the C-style function signature, and the C++ wrapper
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output.write(
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"""
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#ifdef MOZILLA_INTERNAL_API
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extern "C" {
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/**
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* NOTE: Don't call this method directly, instead call mozilla::services::Get%(name)s.
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* It is used to expose XPCOM services to rust code. The return value is already addrefed.
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*/
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%(type)s* XPCOMService_Get%(name)s();
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} // extern "C"
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namespace mozilla {
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namespace services {
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/**
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* Fetch a cached instance of the %(name)s.
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* This function will return nullptr during XPCOM shutdown.
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*/
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inline already_AddRefed<%(type)s>
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Get%(name)s()
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{
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return already_AddRefed<%(type)s>(XPCOMService_Get%(name)s());
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}
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} // namespace services
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} // namespace mozilla
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#endif // defined(MOZILLA_INTERNAL_API)
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"""
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% {
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"name": name,
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"type": iface,
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}
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)
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output.write("#endif // !defined(mozilla_Services_h)\n")
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def services_cpp(output):
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output.write(
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"""\
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/* THIS FILE IS GENERATED BY Services.py - DO NOT EDIT */
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"""
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)
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output.write(CPP_INCLUDES)
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for (name, iface, contractid) in services:
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output.write(
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"""
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static %(type)s* g%(name)s = nullptr;
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extern "C" {
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/**
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* NOTE: Don't call this method directly, instead call `mozilla::services::Get%(name)s`.
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* This method is extern "C" to expose XPCOM services to rust code.
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* The return value is already addrefed.
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*/
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%(type)s*
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XPCOMService_Get%(name)s()
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{
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if (MOZ_UNLIKELY(gXPCOMShuttingDown)) {
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return nullptr;
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}
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if (!g%(name)s) {
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nsCOMPtr<%(type)s> os = do_GetService("%(contractid)s");
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os.swap(g%(name)s);
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}
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return do_AddRef(g%(name)s).take();
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}
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} // extern "C"
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"""
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% {
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"name": name,
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"type": iface,
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"contractid": contractid,
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}
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)
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output.write(
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"""
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/**
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* Clears service cache, sets gXPCOMShuttingDown
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*/
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void
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mozilla::services::Shutdown()
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{
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gXPCOMShuttingDown = true;
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"""
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)
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for (name, iface, contractid) in services:
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output.write(" NS_IF_RELEASE(g%s);\n" % name)
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output.write("}\n")
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def services_rs(output):
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output.write(
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"""\
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/* THIS FILE IS GENERATED BY Services.py - DO NOT EDIT */
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use crate::RefPtr;
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"""
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)
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for (name, iface, _) in services:
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# NOTE: We can't support namespaced interfaces in rust code, so we have to ignore them.
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if "::" in iface:
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continue
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output.write(
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"""
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/// Fetches a cached reference to the `%(name)s`.
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/// This function will return `None` during XPCOM shutdown.
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pub fn get_%(name)s() -> Option<RefPtr<crate::interfaces::%(type)s>> {
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extern "C" {
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fn XPCOMService_Get%(name)s() -> *mut crate::interfaces::%(type)s;
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}
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unsafe { RefPtr::from_raw_dont_addref(XPCOMService_Get%(name)s()) }
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}
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"""
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% {
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"name": name,
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"type": iface,
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}
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)
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