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#include "stdafx.h"
#include "Fn.h"
#include "StrBuf.h"
#include "CloneEnv.h"
#include "Str.h"
namespace storm {
RawFn::RawFn() : fn(null) {}
void RawFn::call(FnBase *ptr, void *out, const void *params) const {
typedef void (*Fn)(FnBase *ptr, void *out, const void *params);
Fn fn = (Fn)this->fn;
(*fn)(ptr, out, params);
}
/**
* Targets.
*/
RawFnTarget::RawFnTarget(const void *ptr) : data(ptr) {}
void RawFnTarget::cloneTo(void *to, size_t size) const {
assert(size >= sizeof(*this));
new (to) RawFnTarget(data);
}
const void *RawFnTarget::ptr() const {
return data;
}
void RawFnTarget::toS(StrBuf *to, const RootObject *) const {
*to << L"C++ function @" << hex(data);
}
const void *RawFnTarget::ctor(const RootObject *) const {
return data;
}
/**
* The function pointer!
*/
FnBase::FnBase(const void *fn, const RootObject *thisPtr, Bool member, Thread *thread) {
ptrMode = member ? modeMember : modeFreeFn;
this->thisPtr = thisPtr;
this->thread = thread;
new (target()) RawFnTarget(fn);
}
FnBase::FnBase(const FnTarget &target, const RootObject *thisPtr, Nat mode, Thread *thread) {
ptrMode = mode;
this->thisPtr = thisPtr;
this->thread = thread;
target.cloneTo(this->target(), targetSize * sizeof(size_t));
}
FnBase::FnBase(const FnBase &o) {
ptrMode = o.ptrMode;
thisPtr = o.thisPtr;
thread = o.thread;
o.target()->cloneTo(target(), targetSize * sizeof(size_t));
}
void FnBase::deepCopy(CloneEnv *env) {
if (thisPtr) {
if (const Object *o = as<const Object>(thisPtr)) {
// Yes, we need to clone it!
cloned(o, env);
thisPtr = o;
}
}
}
Byte FnBase::needsCopy(size_t firstInfo) const {
Thread *t = runOn(firstInfo);
if (t && (t->thread() != os::Thread::current())) {
return 0x1 | ((~ptrMode) & 0x2); // Note: bit-pattern of ptrMode supports this!
} else {
return 0x0;
}
}
Thread *FnBase::runOn(size_t firstInfo) const {
if (thread)
return thread;
if (ptrMode == modeMember) {
if (const TObject *tThis = as<const TObject>(thisPtr)) {
return tThis->associatedThread();
} else if (firstInfo != 0 && (firstInfo & 0x1) == 0) {
const TObject *first = (const TObject *)firstInfo;
return first->associatedThread();
}
} else if (ptrMode == modeActorCtor) {
if (firstInfo & 0x1) {
size_t noTag = firstInfo & ~size_t(0x1);
return (Thread *)noTag;
}
}
return null;
}
void FnBase::callRawI(void *out, const os::FnCallRaw ¶ms, size_t firstInfo, CloneEnv *&env) const {
const void *toCall = target()->ptr();
Thread *thread = runOn(firstInfo);
Bool spawn = (thread && thread->thread() != os::Thread::current());
Bool callMember = ptrMode == modeMember;
void *addFirst = null;
if (thisPtr) {
addFirst = (void *)thisPtr;
if (spawn) {
if (!env)
env = new (this) CloneEnv();
// In this case, 'p' has to be derived from Object.
addFirst = clone((Object *)addFirst, env);
}
}
// Dispatch to the proper thread.
if (spawn) {
os::FutureBase future;
os::UThread::spawnRaw(toCall, callMember, addFirst, params, future, out, &thread->thread());
future.result();
} else {
params.callRaw(toCall, callMember, addFirst, out);
}
}
void FnBase::toS(StrBuf *to) const {
target()->toS(to, thisPtr);
}
RawFn FnBase::rawCall() {
assert(false, L"Override 'rawCall'!");
return RawFn();
}
const void *FnBase::rawCtor() const {
if (ptrMode != modeCtor && ptrMode != modeActorCtor)
return null;
return target()->ctor(thisPtr);
}
}
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