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[Threading] Create new threading library and use it.

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Moved all the threading code to one place.  Added explicit support for
Darwin, Linux, Pthreads, C11 threads and Win32 threads, including new
implementations of Once for Linux, Pthreads, C11 and Win32.

rdar://90776105
This commit is contained in:
Alastair Houghton
2022-04-15 13:50:33 +01:00
parent 66b9d21000
commit f5bdb858e0
98 changed files with 2286 additions and 1410 deletions
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36
stdlib/public/runtime/HeapObject.cpp
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@@ -41,7 +41,6 @@
# include <objc/message.h>
# include <objc/objc.h>
# include "swift/Runtime/ObjCBridge.h"
# include "swift/Runtime/Once.h"
# include <dlfcn.h>
#endif
#include "Leaks.h"
@@ -162,13 +161,6 @@ struct InitStaticObjectContext {
HeapMetadata const *metadata;
};
// Callback for swift_once.
static void initStaticObjectWithContext(void *OpaqueCtx) {
InitStaticObjectContext *Ctx = (InitStaticObjectContext *)OpaqueCtx;
Ctx->object->metadata = Ctx->metadata;
Ctx->object->refCounts.initImmortal();
}
// TODO: We could generate inline code for the fast-path, i.e. the metadata
// pointer is already set. That would be a performance/codesize tradeoff.
HeapObject *
@@ -182,7 +174,11 @@ swift::swift_initStaticObject(HeapMetadata const *metadata,
// refcount to 1 while another thread already incremented it - and would
// decrement it to 0 afterwards.
InitStaticObjectContext Ctx = { object, metadata };
swift_once(token, initStaticObjectWithContext, &Ctx);
swift::once(*token, [](void *OpaqueCtx) {
InitStaticObjectContext *Ctx = (InitStaticObjectContext *)OpaqueCtx;
Ctx->object->metadata = Ctx->metadata;
Ctx->object->refCounts.initImmortal();
}, &Ctx);
return object;
}
@@ -350,7 +346,7 @@ static HeapObject *_swift_retain_(HeapObject *object) {
}
HeapObject *swift::swift_retain(HeapObject *object) {
#ifdef SWIFT_STDLIB_THREADING_NONE
#ifdef SWIFT_THREADING_NONE
return swift_nonatomic_retain(object);
#else
CALL_IMPL(swift_retain, (object));
@@ -377,7 +373,7 @@ static HeapObject *_swift_retain_n_(HeapObject *object, uint32_t n) {
}
HeapObject *swift::swift_retain_n(HeapObject *object, uint32_t n) {
#ifdef SWIFT_STDLIB_THREADING_NONE
#ifdef SWIFT_THREADING_NONE
return swift_nonatomic_retain_n(object, n);
#else
CALL_IMPL(swift_retain_n, (object, n));
@@ -403,7 +399,7 @@ static void _swift_release_(HeapObject *object) {
}
void swift::swift_release(HeapObject *object) {
#ifdef SWIFT_STDLIB_THREADING_NONE
#ifdef SWIFT_THREADING_NONE
swift_nonatomic_release(object);
#else
CALL_IMPL(swift_release, (object));
@@ -428,7 +424,7 @@ static void _swift_release_n_(HeapObject *object, uint32_t n) {
}
void swift::swift_release_n(HeapObject *object, uint32_t n) {
#ifdef SWIFT_STDLIB_THREADING_NONE
#ifdef SWIFT_THREADING_NONE
swift_nonatomic_release_n(object, n);
#else
CALL_IMPL(swift_release_n, (object, n));
@@ -460,7 +456,7 @@ size_t swift::swift_weakRetainCount(HeapObject *object) {
}
HeapObject *swift::swift_unownedRetain(HeapObject *object) {
#ifdef SWIFT_STDLIB_THREADING_NONE
#ifdef SWIFT_THREADING_NONE
return static_cast<HeapObject *>(swift_nonatomic_unownedRetain(object));
#else
SWIFT_RT_TRACK_INVOCATION(object, swift_unownedRetain);
@@ -473,7 +469,7 @@ HeapObject *swift::swift_unownedRetain(HeapObject *object) {
}
void swift::swift_unownedRelease(HeapObject *object) {
#ifdef SWIFT_STDLIB_THREADING_NONE
#ifdef SWIFT_THREADING_NONE
swift_nonatomic_unownedRelease(object);
#else
SWIFT_RT_TRACK_INVOCATION(object, swift_unownedRelease);
@@ -520,7 +516,7 @@ void swift::swift_nonatomic_unownedRelease(HeapObject *object) {
}
HeapObject *swift::swift_unownedRetain_n(HeapObject *object, int n) {
#ifdef SWIFT_STDLIB_THREADING_NONE
#ifdef SWIFT_THREADING_NONE
return swift_nonatomic_unownedRetain_n(object, n);
#else
SWIFT_RT_TRACK_INVOCATION(object, swift_unownedRetain_n);
@@ -533,7 +529,7 @@ HeapObject *swift::swift_unownedRetain_n(HeapObject *object, int n) {
}
void swift::swift_unownedRelease_n(HeapObject *object, int n) {
#ifdef SWIFT_STDLIB_THREADING_NONE
#ifdef SWIFT_THREADING_NONE
swift_nonatomic_unownedRelease_n(object, n);
#else
SWIFT_RT_TRACK_INVOCATION(object, swift_unownedRelease_n);
@@ -583,7 +579,7 @@ static HeapObject *_swift_tryRetain_(HeapObject *object) {
if (!isValidPointerForNativeRetain(object))
return nullptr;
#ifdef SWIFT_STDLIB_THREADING_NONE
#ifdef SWIFT_THREADING_NONE
if (object->refCounts.tryIncrementNonAtomic()) return object;
else return nullptr;
#else
@@ -612,7 +608,7 @@ void swift::swift_setDeallocating(HeapObject *object) {
}
HeapObject *swift::swift_unownedRetainStrong(HeapObject *object) {
#ifdef SWIFT_STDLIB_THREADING_NONE
#ifdef SWIFT_THREADING_NONE
return swift_nonatomic_unownedRetainStrong(object);
#else
SWIFT_RT_TRACK_INVOCATION(object, swift_unownedRetainStrong);
@@ -640,7 +636,7 @@ HeapObject *swift::swift_nonatomic_unownedRetainStrong(HeapObject *object) {
}
void swift::swift_unownedRetainStrongAndRelease(HeapObject *object) {
#ifdef SWIFT_STDLIB_THREADING_NONE
#ifdef SWIFT_THREADING_NONE
swift_nonatomic_unownedRetainStrongAndRelease(object);
#else
SWIFT_RT_TRACK_INVOCATION(object, swift_unownedRetainStrongAndRelease);