6fca37c69e
The seq serialization machinery is a historic artifact from when Go mobile code had to run in a separate process. Now that Go code is running in-process, replace the explicit serialization with direct calls and pass arguments on the stack. The benefits are a much smaller bind runtime, much less garbage (and, in Java, fewer objects with finalizers), less argument copying, and faster cross-language calls. The cost is a more complex generator, because some of the work from the bind runtime is moved to generated code. Generated code now handles conversion between Go and Java/ObjC types, multiple return values and memory management of byte slice and string arguments. To overcome the lack of calling C code between Go packages, all bound packages now end up in the same (fake) package, "gomobile_bind", instead of separate packages (go_<pkgname>). To avoid name clashes, the package name is added as a prefix to generated functions and types. Also, don't copy byte arrays passed to Go, saving call time and allowing read([]byte)-style interfaces to foreign callers (#12113). Finally, add support for nil interfaces and struct pointers to objc. This is a large CL, but most of the changes stem from changing testdata. The full benchcmp output on the CL/20095 benchmarks on my Nexus 5 is reproduced below. Note that the savings for the JavaSlice* benchmarks are skewed because byte slices are no longer copied before passing them to Go. benchmark old ns/op new ns/op delta BenchmarkJavaEmpty 26.0 19.0 -26.92% BenchmarkJavaEmptyDirect 23.0 22.0 -4.35% BenchmarkJavaNoargs 7685 2339 -69.56% BenchmarkJavaNoargsDirect 17405 8041 -53.80% BenchmarkJavaOnearg 26887 2366 -91.20% BenchmarkJavaOneargDirect 34266 7910 -76.92% BenchmarkJavaOneret 38325 2245 -94.14% BenchmarkJavaOneretDirect 46265 7708 -83.34% BenchmarkJavaManyargs 41720 2535 -93.92% BenchmarkJavaManyargsDirect 51026 8373 -83.59% BenchmarkJavaRefjava 38139 21260 -44.26% BenchmarkJavaRefjavaDirect 42706 28150 -34.08% BenchmarkJavaRefgo 34403 6843 -80.11% BenchmarkJavaRefgoDirect 40193 16582 -58.74% BenchmarkJavaStringShort 32366 9323 -71.20% BenchmarkJavaStringShortDirect 41973 19118 -54.45% BenchmarkJavaStringLong 127879 94420 -26.16% BenchmarkJavaStringLongDirect 133776 114760 -14.21% BenchmarkJavaStringShortUnicode 32562 9221 -71.68% BenchmarkJavaStringShortUnicodeDirect 41464 19094 -53.95% BenchmarkJavaStringLongUnicode 131015 89401 -31.76% BenchmarkJavaStringLongUnicodeDirect 134130 90786 -32.31% BenchmarkJavaSliceShort 42462 7538 -82.25% BenchmarkJavaSliceShortDirect 52940 17017 -67.86% BenchmarkJavaSliceLong 138391 8466 -93.88% BenchmarkJavaSliceLongDirect 205804 15666 -92.39% BenchmarkGoEmpty 3.00 3.00 +0.00% BenchmarkGoEmptyDirect 3.00 3.00 +0.00% BenchmarkGoNoarg 40342 13716 -66.00% BenchmarkGoNoargDirect 46691 13569 -70.94% BenchmarkGoOnearg 43529 13757 -68.40% BenchmarkGoOneargDirect 44867 14078 -68.62% BenchmarkGoOneret 45456 13559 -70.17% BenchmarkGoOneretDirect 44694 13442 -69.92% BenchmarkGoRefjava 55111 28071 -49.06% BenchmarkGoRefjavaDirect 60883 26872 -55.86% BenchmarkGoRefgo 57038 29223 -48.77% BenchmarkGoRefgoDirect 56153 27812 -50.47% BenchmarkGoManyargs 67967 17398 -74.40% BenchmarkGoManyargsDirect 60617 16998 -71.96% BenchmarkGoStringShort 57538 22600 -60.72% BenchmarkGoStringShortDirect 52627 22704 -56.86% BenchmarkGoStringLong 128485 52530 -59.12% BenchmarkGoStringLongDirect 138377 52079 -62.36% BenchmarkGoStringShortUnicode 57062 22994 -59.70% BenchmarkGoStringShortUnicodeDirect 62563 22938 -63.34% BenchmarkGoStringLongUnicode 139913 55553 -60.29% BenchmarkGoStringLongUnicodeDirect 150863 57791 -61.69% BenchmarkGoSliceShort 59279 20215 -65.90% BenchmarkGoSliceShortDirect 60160 21136 -64.87% BenchmarkGoSliceLong 411225 301870 -26.59% BenchmarkGoSliceLongDirect 399029 298915 -25.09% Fixes golang/go#12619 Fixes golang/go#12113 Fixes golang/go#13033 Change-Id: I2b45e9e98a1248e3c23a5137f775f7364908bec7 Reviewed-on: https://go-review.googlesource.com/19821 Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
78 lines
2.8 KiB
Objective-C
78 lines
2.8 KiB
Objective-C
// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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#ifndef __GO_SEQ_HDR__
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#define __GO_SEQ_HDR__
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#include <Foundation/Foundation.h>
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#ifdef DEBUG
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#define LOG_DEBUG(...) NSLog(__VA_ARGS__);
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#else
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#define LOG_DEBUG(...) ;
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#endif
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#define LOG_INFO(...) NSLog(__VA_ARGS__);
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#define LOG_FATAL(...) \
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{ \
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NSLog(__VA_ARGS__); \
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@throw \
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[NSException exceptionWithName:NSInternalInconsistencyException \
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reason:[NSString stringWithFormat:__VA_ARGS__] \
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userInfo:NULL]; \
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}
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// GoSeqRef is an object tagged with an integer for passing back and
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// forth across the language boundary. A GoSeqRef may represent either
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// an instance of a Go object, or an Objective-C object passed to Go.
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// The explicit allocation of a GoSeqRef is used to pin a Go object
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// when it is passed to Objective-C. The Go seq package maintains a
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// reference to the Go object in a map keyed by the refnum. When the
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// GoSeqRef is deallocated, the Go seq package will clear the
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// corresponding entry in the map.
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// TODO(hyangah): update the doc as golang.org/issue/10933 is fixed.
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@interface GoSeqRef : NSObject {
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}
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@property int32_t refnum;
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@property(strong) id obj; // NULL when representing a Go object.
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// new GoSeqRef object to proxy a Go object. The refnum must be
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// provided from Go side.
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- (instancetype)initWithRefnum:(int32_t)refnum obj:(id)obj;
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@end
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// Platform specific types
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typedef struct nstring {
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void *ptr;
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int len;
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} nstring;
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typedef struct nbyteslice {
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void *ptr;
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int len;
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} nbyteslice;
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typedef int nint;
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extern void init_seq();
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// go_seq_dec_ref decrements the reference count for the
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// sepcified refnum. It is called from Go from a finalizer.
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extern void go_seq_dec_ref(int32_t refnum);
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extern int32_t go_seq_to_refnum(id obj);
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// go_seq_go_to_refnum is a special case of go_seq_to_refnum
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extern int32_t go_seq_go_to_refnum(GoSeqRef *ref);
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extern GoSeqRef *go_seq_from_refnum(int32_t refnum);
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// go_seq_objc_from_refnum is a special case of go_seq_from_refnum for
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// Objective-C objects that implement a Go interface.
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extern id go_seq_objc_from_refnum(int32_t refnum);
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extern nbyteslice go_seq_from_objc_bytearray(NSData *data, int copy);
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extern nstring go_seq_from_objc_string(NSString *s);
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extern NSData *go_seq_to_objc_bytearray(nbyteslice, int copy);
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extern NSString *go_seq_to_objc_string(nstring str);
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#endif // __GO_SEQ_HDR__
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