forked from KolibriOS/kolibrios
69 lines
1.1 KiB
C
69 lines
1.1 KiB
C
/* default reentrant pointer when multithread enabled */
|
|
|
|
#include <_ansi.h>
|
|
#include <string.h>
|
|
#include <reent.h>
|
|
|
|
static inline
|
|
void *user_alloc(int size)
|
|
{
|
|
void *val;
|
|
__asm__ __volatile__(
|
|
"int $0x40"
|
|
:"=eax"(val)
|
|
:"a"(68),"b"(12),"c"(size));
|
|
return val;
|
|
}
|
|
|
|
void init_reent()
|
|
{
|
|
struct _reent *ent;
|
|
|
|
ent = user_alloc(sizeof(struct _reent));
|
|
|
|
_REENT_INIT_PTR(ent);
|
|
|
|
__asm__ __volatile__(
|
|
"movl %0, %%fs:12"
|
|
::"r"(ent));
|
|
__sinit(ent);
|
|
}
|
|
|
|
void init_global_reent()
|
|
{
|
|
struct _reent *ent;
|
|
|
|
ent =_GLOBAL_REENT;
|
|
|
|
_REENT_INIT_PTR(ent);
|
|
|
|
__asm__ __volatile__(
|
|
"movl %0, %%fs:12"
|
|
::"r"(ent));
|
|
__sinit(ent);
|
|
}
|
|
|
|
|
|
void __mutex_lock(volatile int *val)
|
|
{
|
|
int tmp;
|
|
|
|
__asm__ __volatile__ (
|
|
"0:\n\t"
|
|
"mov %0, %1\n\t"
|
|
"testl %1, %1\n\t"
|
|
"jz 1f\n\t"
|
|
|
|
"movl $68, %%eax\n\t"
|
|
"movl $1, %%ebx\n\t"
|
|
"int $0x40\n\t"
|
|
"jmp 0b\n\t"
|
|
"1:\n\t"
|
|
"incl %1\n\t"
|
|
"xchgl %0, %1\n\t"
|
|
"testl %1, %1\n\t"
|
|
"jnz 0b\n"
|
|
: "+m" (*val), "=&r"(tmp)
|
|
::"eax","ebx" );
|
|
}
|