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// for memcpy()
#include <string.h>
#include <bits/ensure.h>
#include <mlibc/allocator.hpp>
#include <frg/eternal.hpp>
#include <frg/vector.hpp>
struct ExitHandler {
void (*function)(void *);
void *argument;
void *dsoHandle;
};
using ExitQueue = frg::vector<ExitHandler, MemoryAllocator>;
ExitQueue &getExitQueue() {
// use frg::eternal to prevent the compiler from scheduling the destructor
// by generating a call to __cxa_atexit().
static frg::eternal<ExitQueue> singleton(getAllocator());
return singleton.get();
}
extern "C" int __cxa_atexit(void (*function)(void *), void *argument, void *handle) {
ExitHandler handler;
handler.function = function;
handler.argument = argument;
handler.dsoHandle = handle;
getExitQueue().push(handler);
return 0;
}
void __mlibc_do_finalize() {
ExitQueue &eq = getExitQueue();
for(size_t i = eq.size(); i > 0; i--) {
auto handler = &eq[i - 1];
handler->function(handler->argument);
}
}
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