A framework generated with gomobile bind -target=ios has two global
constructors: one initializing a data structure and another using it.
These constructors are defined in different translation units, which
(I believe, reasoning from C++ global constructors) means their order
of initialization is undefined.
A capturing block is stack allocated. Its memory is invalid after the
function returns. Make a copy of the interface initializer blocks so
they can be saved to the heap.
Block implementation background:
http://www.cocoawithlove.com/2009/10/how-blocks-are-implemented-and.html
Updates golang/go#12590
Change-Id: Ia7ae9f4bbd8df6e6e79949de54b3e6c48148c700
Reviewed-on: https://go-review.googlesource.com/14549
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
To improve readability for default numeric types
represented as strings, use 0.0 for floating point types.
(No tests make use of this change so golden update
not necessary; not significant enough for new test/test mod.)
Fix spelling on error statement; this was the only
instance of that spelling error in the repository.
Change-Id: I373890725b33da11c6780ba93674d89541bf758c
Reviewed-on: https://go-review.googlesource.com/13645
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
Introduce options -javapkg and -prefix for gobind command.
The following generates java class Testpkg with package name com.example.
gobind -lang=java -javapkg=com.example testpkg
The following generates objective-c files where function and type names
are prefixed with ExampleTestpkg.
gobind -lang=objc -prefix=Example testpkg
As discussed in golang/go#9660 and golang/go#12245.
Gomobile support is not yet implemented.
Change-Id: Ib9e39997ce915580a5a2e25643c0c28373f27ee1
Reviewed-on: https://go-review.googlesource.com/13969
Reviewed-by: David Crawshaw <crawshaw@golang.org>
Tests now pass on OS X.
Change-Id: Id2e6c5bd9ddd4070962ff9bc121d7902e8c9a647
Reviewed-on: https://go-review.googlesource.com/13694
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
For interface binding, we need only protocols.
Change-Id: I377ec9c8de0a3414d48272892b169fb94823e8ff
Reviewed-on: https://go-review.googlesource.com/13541
Reviewed-by: David Crawshaw <crawshaw@golang.org>
Given a Go package defining an interface,
package testpkg
type I interface {
Fn()
}
I is mapped to an objective-c protocol and a proxy interface
that implements the routing of method calls from Go.
@protocol GoTestpkgI
-(void)Fn;
@end
Users implement a class conforming the generated protocol. For example,
@interface MyI <GoTestpkgI> {
}
@end
@implementation MyI {
}
- (void)Fn { .... }
@end
Gobind will also create a proxy interface to handle Go objects
implementing the interface and passed to Objective-C, but that will
be hidden from users.
@interface GoTestpkgI : NSObject <GoTestpkgI> {
...
-(void)Fn;
@end
The gobind code to generate the objective-c binding is in a separate CL.
Change-Id: I6a72d34fe3a5b8d2774d2d53913229c1e71f2d60
Reviewed-on: https://go-review.googlesource.com/12389
Reviewed-by: David Crawshaw <crawshaw@golang.org>
Reviewed-by: Damien Neil <dneil@google.com>
This breaks our dependency on the x/tools repository, which has a
tendency to change in unexpected ways. It also means we can use the
version of go/types that ships with Go 1.5.
Along the way, it appears that cgo processing has changed slightly.
The old check for cgo files apparently wasn't working, so I removed
it.
Change-Id: I14378e9df9cd65c5ab61b47728ba0d56f31cdf76
Reviewed-on: https://go-review.googlesource.com/12680
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
seq.Transact is called when Go calls a method of a foreign object
that implements a Go interface. Currently, we assume that the foreign
object has an instance method that can conduct the message routing,
so the object id and the method code is sufficient for transact.
Passing the interface descriptor (e.g. go.testpkg.I) however allows
the bind internal to use non-instance methods to implement the routing.
Change-Id: I1f61a04f919fbd09117ea332d678cd50e4861e46
Reviewed-on: https://go-review.googlesource.com/12685
Reviewed-by: David Crawshaw <crawshaw@golang.org>
Also, fixes the memory allocation bug - misuse of mem_ensure that caused
to allocate 72 bytes of memory to carry 16 bytes of data for instance.
Fixesgolang/go#11842.
Change-Id: I21798be2ec7adfb68cc2897bb46a924f05f3478c
Reviewed-on: https://go-review.googlesource.com/12577
Reviewed-by: David Crawshaw <crawshaw@golang.org>
mem_ensure is to ensure the remaining space in buffer
is large enough to hold extra size bytes. We've been passing
the target capacity instead of the number of extra bytes we
need.
Change-Id: Ic6f6ddb4ad22cbcdbc44eb4a58e6a415ae771fb2
Reviewed-on: https://go-review.googlesource.com/12578
Reviewed-by: David Crawshaw <crawshaw@golang.org>
non-varargs call of varargs method with inexact argument type for last
parameter
Change-Id: I7623951c365b8cf899a17ee784c8d4f3b4bdb198
Reviewed-on: https://go-review.googlesource.com/12528
Reviewed-by: David Crawshaw <crawshaw@golang.org>
This is done by moving app.Context to internal/mobileinit,
introducing mobileinit.SetCurrentContext and,
making bind/java depend on it.
TODO: check gomobile bind's proguard rule - context lookup
was implemented through reflection on android.app.AppGlobals class.
Change-Id: Ieb6ad503eeef8c2c1c5836a21c667938c5a701a2
Reviewed-on: https://go-review.googlesource.com/12279
Reviewed-by: David Crawshaw <crawshaw@golang.org>
This allows gomobile bind to stop copying seq.h to the destination.
Change-Id: I4a23613fe0407500ad483ae9d8f6bb823d82f082
Reviewed-on: https://go-review.googlesource.com/12300
Reviewed-by: David Crawshaw <crawshaw@golang.org>
The goal here is to remove several inconsistencies between
-target=android and -target=ios support, along with making the flow
of the command follow the path you might expect given a certain set
of flags, and preparing for `gomobile bind` support of ios. In
particular, building non-main packages now works with both targets
and the initialization of global build state is clearer.
The reorg also is designed around an nm trick I thought of
yesterday to do better package import scanning without a slow
all-file scan. This will give better detection of x/mobile/app and
x/mobile/exp/audio/al packages. There's a TODO about it, and I'll do
it in a future CL.
Tested with:
go test golang.org/x/mobile/cmd/gomobile
gomobile init
gomobile bind golang.org/x/mobile/asset
go test golang.org/x/mobile/bind/java
gomobile build -target=ios golang.org/x/mobile/example/basic
gomobile build -target=ios golang.org/x/mobile/gl
gomobile build -target=android golang.org/x/mobile/gl
gomobile build -target=android golang.org/x/mobile/example/basic
(Along with manual testing of basic on an android device.)
That might make a pretty good _test.go.
Change-Id: I41230008c3c15db25a11c33b9eaca4abada9f411
Reviewed-on: https://go-review.googlesource.com/12051
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
Android support has advanced to the point where this logging statement
adds very little information.
Change-Id: I3c8c9d60be8c0b52a519f9e44711bd211b5bfe67
Reviewed-on: https://go-review.googlesource.com/11990
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
Package app contains some logic that we want to share with
gobind-based libraries. So move it to a new internal package
that both can import.
Long term the log changes should be in the standard library,
but the Go tree is currently frozen.
Fixesgolang/go#11630.
Change-Id: I9ff622fc499bf255bce18df23cb68b03f667947f
Reviewed-on: https://go-review.googlesource.com/11981
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
Before this change, func Hello() of mypkg package generated a function
GoMypkg_Hello to distinguish the prefix from the function name.
It seems the use of '_' is very rare in Objective-C though.
After this change, it generates GoMypkgHello.
Change-Id: Ic7aa2b667363a447a5ff3500262502d3137d6853
Reviewed-on: https://go-review.googlesource.com/11893
Reviewed-by: Damien Neil <dneil@google.com>
Historically, the app package implemented Go runtime initialization.
This was convoluted, so the package was used both by all-Go apps
(currently based on Android's NativeActivity) and bind-based apps.
With Go 1.5 we have -buildmode=c-shared, which does a lot of the work
of the old app package. That code was removed a while back, but both
all-Go and gobind-based apps still used package app. The intermingled
initialization processes led to some strange states.
This CL separates gobind-based apps completely from the app package.
As part of that users are now expected to use System.loadLibrary
themselves. (A future CL may want to make the loadLibrary call part
of the .aar generated by gomobile bind.)
Delete the libhello example, which has been replaced by gomobile bind,
which could do with its own example at some point. Also delete the
libhellojni example, which now has nothing to do with the x/mobile
repository.
Change-Id: I444397f246dbafe81e5c53532eb482c197d26f70
Reviewed-on: https://go-review.googlesource.com/11654
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
The existing implementation generates uncompilable objc code for
functions returning two results.
Change-Id: I13f7329596d8fa6103c4b7827c26c5461e16a925
Reviewed-on: https://go-review.googlesource.com/11364
Reviewed-by: David Crawshaw <crawshaw@golang.org>
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
Translate error type to NSError.
Interface type is not supported yet.
Change-Id: I54abba2360cff41ef8ca08063b0120e7edd65a47
Reviewed-on: https://go-review.googlesource.com/10793
Reviewed-by: David Crawshaw <crawshaw@golang.org>
Reviewed-by: Damien Neil <dneil@google.com>
With https://go-review.googlesource.com/10638, the reference counting
of Go objects can be simplified. Everytime a Go object is passed into
Objective-C side, a new proxy object with GoSeqRef is created.
Deallocation of a GoSeqRef decrements the reference counter of the
corresponding Go object.
Test the Go object is collected.
Note: It's possible to reduce the number of GoSeqRef
allocations by maintaining a map of weak references to the existing
GoSeqRef, but for now, we allocate a new GoSeqRef instance.
Change-Id: I57a5a4b249c5800d9eba95d128a2cdf74bbef566
Reviewed-on: https://go-review.googlesource.com/10639
Reviewed-by: David Crawshaw <crawshaw@golang.org>
Reviewed-by: Damien Neil <dneil@google.com>
The gobind framework is supposed to use reference counting to
keep track of objects (e.g. pointer to a Go struct, interface
values) crossing the language boundary. This change fixes two bugs:
1) no reference counting on Java object: Previously, the lifetime
of a Java object was manages in the following way.
a. The Java object is pinned in an internal map (javaObjs) when it's
constructed.
b. When Go receives the reference to the Java object, it creates a
proxy object and sets a finalizer on it. The finalizer signals Java
to unpin the Java object (remove from the javaObjs map).
c. The javaObjs map is also used to identify the Java object when
Go asks to invoke a method on it later.
When the same Java object is sent to Java more than once, and the
finalizer (b) runs after the first use, the second use of the Java
object can cause the crash described in golang/go#10933.
This change fixes the bug by reference counting the Java object.
Java side pins the Java object and increments the refcount whenever it
sees the object sent to Go (in Seq.writeRef). When the Go proxy
object's finalizer runs, the refcount is decremented. When the refcount
becomes 0, the object gets unpined.
2) race in Go object lifetime management: Pinning on a Go object
has been done when the Go object is sent to Java but the Go object
is not in the pinned object map yet. (bind/seq.WriteGoRef).
Unpinning the object occurs when Java finds there are no proxy objects
on its side. For this, Java maintains a reference count map (goObjs).
When the refcount becomes zero, Java notifies Go so the object is
unpinned. Here is a race case:
a. Java has a proxy object for a Go object.
b. Go is preparing for sending the same Go object. seq.WriteGoRef
notices the corresponding entry in the pinned object map already,
and returns. The remaining work for sending the object continues.
c. The proxy object in Java finalizes and triggers deletion of the
object from the pinned object map.
d. The remaining work for (b) completes and Java creates a new proxy
object. When a method is called for the Go object, the Go object is
already removed from the object map on Go side and maybe already GC'd.
This change fixes it by converting the pinned object map to reference
counter map maintained in Go. The counter increments for each
seq.WriteGoRef call. The finalizer of the proxy object in Java causes
a decrement of the counter.
Fixesgolang/go#10933.
Renables the skipped testJavaRefGC.
Change-Id: I0992e002b1050b6183689e5ab821e058adbb420f
Reviewed-on: https://go-review.googlesource.com/10638
Reviewed-by: David Crawshaw <crawshaw@golang.org>
After CL 10296 the workaround from CL 9783 is no longer necessary.
Revert the workaround but keep the global reference, just in case.
Change-Id: I3fdd580e4122c36508beb9d328739b910dbbe2e2
Reviewed-on: https://go-review.googlesource.com/10483
Reviewed-by: David Crawshaw <crawshaw@golang.org>
This ensures that the java bindings are ready before any calls are
made by user code. As a bonus, the JNIEnv* is from the Seq class so I
believe no tricks are required to find the right class loader.
Fixesgolang/go#10903.
Change-Id: I33b3b39cef6cc2da36e271de882ba8d26610ea34
Reviewed-on: https://go-review.googlesource.com/10296
Reviewed-by: Elias Naur <elias.naur@gmail.com>
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
test.bash is a simple script that builds the c-shared library from
test_main.go, compiles SeqTest.m and the objective-c bindings of testpkg
(testpkg/objc_testpkg/GoTestpkg.*), and runs the output. Eventually this
will be replaced with coed that runs gomobile bind & xcodebuild.
The code under testpkg/go_testpkg and testpkg/objc_testpkg is the output
of gobind (now manually-generated). I am adding it to repo now in order
to get the testpkg/objc_tstpkg reviewed. Eventually, this will be
removed from the repo.
Change-Id: I8d6af3732337992af922cb4615a63f385e19d489
Reviewed-on: https://go-review.googlesource.com/9826
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
Also fixes a parameter name handling problem when processing a
function signature that omits parameter names.
Fixesgolang/go#10788.
Change-Id: I65273d330bbf3a836ec9e4ffb691927970d795d8
Reviewed-on: https://go-review.googlesource.com/9926
Reviewed-by: Alan Donovan <adonovan@google.com>
The previous way (JNIEnv's FindClass with "[B") does not work
in Android-L for some reason.
Change-Id: I5cccb7bbf651df981a923ecade863302521d5c5c
Reviewed-on: https://go-review.googlesource.com/9783
Reviewed-by: David Crawshaw <crawshaw@golang.org>
