* Copyright 2014, Paweł Dziepak, pdziepak@quarnos.org.
* Copyright 2012, Alex Smith, alex@alex-smith.me.uk.
* Distributed under the terms of the MIT License.
*/
#include <atomic>
#include <runtime_loader/runtime_loader.h>
#include <support/TLS.h>
#include <tls.h>
#include <assert.h>
struct tls_index {
unsigned long int module;
unsigned long int offset;
};
static std::atomic<int> gNextSlot(TLS_FIRST_FREE_SLOT);
static inline void**
get_tls()
{
void** tls;
__asm__ __volatile__ ("movq %%fs:0, %0" : "=r" (tls));
return tls;
}
int32
tls_allocate()
{
if (gNextSlot < TLS_MAX_KEYS) {
auto next = gNextSlot++;
if (next < TLS_MAX_KEYS)
return next;
}
return B_NO_MEMORY;
}
void*
tls_get(int32 index)
{
return get_tls()[index];
}
void**
tls_address(int32 index)
{
return get_tls() + index;
}
void
tls_set(int32 index, void* value)
{
get_tls()[index] = value;
}
extern "C" void*
__tls_get_addr(tls_index* ti)
{
return __gRuntimeLoader->get_tls_address(ti->module, ti->offset);
}
