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AK: Add Eternal<T> and use it in various places.

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This is useful for static locals that never need to be destroyed:

Thing& Thing::the()
{
    static Eternal<Thing> the;
    return the;
}

The object will be allocated in data segment memory and will never have
its destructor invoked.
This commit is contained in:
Andreas Kling 2019-04-03 16:50:08 +02:00
parent 528054d192
commit c02c9880b6
23 changed files with 78 additions and 81 deletions
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7
Kernel/Net/LoopbackAdapter.cpp
View file

@ -1,11 +1,10 @@
#include <Kernel/Net/LoopbackAdapter.h>
#include <AK/Eternal.h>
LoopbackAdapter& LoopbackAdapter::the()
{
static LoopbackAdapter* the;
if (!the)
the = new LoopbackAdapter;
return *the;
static Eternal<LoopbackAdapter> the;
return the;
}
LoopbackAdapter::LoopbackAdapter()

5
Kernel/Net/LoopbackAdapter.h
View file

@ -6,12 +6,11 @@ class LoopbackAdapter final : public NetworkAdapter {
AK_MAKE_ETERNAL
public:
static LoopbackAdapter& the();
virtual ~LoopbackAdapter() override;
LoopbackAdapter();
virtual void send_raw(const byte*, int) override;
virtual const char* class_name() const override { return "LoopbackAdapter"; }
private:
LoopbackAdapter();
virtual ~LoopbackAdapter() override;
};

8
Kernel/Net/NetworkTask.cpp
View file

@ -12,7 +12,7 @@
#include <Kernel/Process.h>
#include <Kernel/Net/EtherType.h>
#include <Kernel/Lock.h>
#include <AK/Eternal.h>
//#define ETHERNET_DEBUG
#define IPV4_DEBUG
@ -28,10 +28,8 @@ static void handle_tcp(const EthernetFrameHeader&, int frame_size);
Lockable<HashMap<IPv4Address, MACAddress>>& arp_table()
{
static Lockable<HashMap<IPv4Address, MACAddress>>* the;
if (!the)
the = new Lockable<HashMap<IPv4Address, MACAddress>>;
return *the;
static Eternal<Lockable<HashMap<IPv4Address, MACAddress>>> the;
return the;
}
void NetworkTask_main()