C++ (Cpp) pre_seq_barrier示例

示例#1

文件： gstore.c 项目： abumaryam/gcc

void
libat_store (size_t n, void *mptr, void *vptr, int smodel)
{
  switch (n)
    {
    case 0:				return;
    case 1:		EXACT(1);	goto L4;
    case 2:		EXACT(2);	goto L4;
    case 4:		EXACT(4);	goto L8;
    case 8:		EXACT(8);	goto L16;
    case 16:		EXACT(16);	break;

    case 3: L4:		LARGER(4);	/* FALLTHRU */
    case 5 ... 7: L8:	LARGER(8);	/* FALLTHRU */
    case 9 ... 15: L16:	LARGER(16);	break;
    }

  pre_seq_barrier (smodel);
  libat_lock_n (mptr, n);

  memcpy (mptr, vptr, n);

  libat_unlock_n (mptr, n);
  post_seq_barrier (smodel);
}

示例#2

文件： gload.c 项目： MaxKellermann/gcc

void
libat_load (size_t n, void *mptr, void *rptr, int smodel)
{
  union max_size_u u;
  uintptr_t r, a;

  switch (n)
    {
    case 0:				return;
    case 1:		EXACT(1);	goto L4;
    case 2:		EXACT(2);	goto L4;
    case 4:		EXACT(4);	goto L8;
    case 8:		EXACT(8);	goto L16;
    case 16:		EXACT(16);	break;

    case 3: L4:		LARGER(4);	/* FALLTHRU */
    case 5 ... 7: L8:	LARGER(8);	/* FALLTHRU */
    case 9 ... 15: L16:	LARGER(16);	break;

    Lfinish:
      memcpy (rptr, u.b + r, n);
      return;
    }

  pre_seq_barrier (smodel);
  libat_lock_n (mptr, n);

  memcpy (rptr, mptr, n);

  libat_unlock_n (mptr, n);
  post_seq_barrier (smodel);
}

示例#3

文件： store_n.c 项目： jroelofs/darwin-gcc-5

void
SIZE(libat_store) (UTYPE *mptr, UTYPE newval, int smodel)
{
    UWORD magic;

    pre_seq_barrier (smodel);
    magic = protect_start (mptr);

    *mptr = newval;

    protect_end (mptr, magic);
    post_seq_barrier (smodel);
}

示例#4

文件： load_n.c 项目： ChaosJohn/gcc

UTYPE
SIZE(libat_load) (UTYPE *mptr, int smodel)
{
  UTYPE ret;
  UWORD magic;

  pre_seq_barrier (smodel);
  magic = protect_start (mptr);

  ret = *mptr;

  protect_end (mptr, magic);
  post_seq_barrier (smodel);

  return ret;
}

示例#5

文件： tas_n.c 项目： AlexMioMio/gcc

bool
SIZE(libat_test_and_set) (UTYPE *mptr, int smodel)
{
  UTYPE oldval;
  UWORD magic;

  pre_seq_barrier (smodel);
  magic = protect_start (mptr);

  oldval = *mptr;
  *mptr = __GCC_ATOMIC_TEST_AND_SET_TRUEVAL;

  protect_end (mptr, magic);
  post_seq_barrier (smodel);

  return oldval != 0;
}

示例#6

文件： exch_n.c 项目： 0day-ci/gcc

UTYPE
SIZE(libat_exchange) (UTYPE *mptr, UTYPE newval, int smodel UNUSED)
{
  UTYPE oldval;
  UWORD magic;

  pre_seq_barrier (smodel);
  magic = protect_start (mptr);

  oldval = *mptr;
  *mptr = newval;

  protect_end (mptr, magic);
  post_seq_barrier (smodel);

  return oldval;
}

示例#7

文件： fop_n.c 项目： kostyll/gccpy

UTYPE
SIZE(C3(libat_,NAME,_fetch)) (UTYPE *mptr, UTYPE opval, int smodel UNUSED)
{
    UTYPE ret;
    UWORD magic;

    pre_seq_barrier (smodel);
    magic = protect_start (mptr);

    ret = OP (*mptr, opval);
    *mptr = ret;

    protect_end (mptr, magic);
    post_seq_barrier (smodel);

    return ret;
}

示例#8

文件： gexch.c 项目： Lao16/gcc

void
libat_exchange (size_t n, void *mptr, void *vptr, void *rptr, int smodel)
{
  union max_size_u u, v;
  uintptr_t r, a;

  switch (n)
    {
    case 0:				return;
    case 1:		EXACT(1);	goto L4;
    case 2:		EXACT(2);	goto L4;
    case 4:		EXACT(4);	goto L8;
    case 8:		EXACT(8);	goto L16;
    case 16:		EXACT(16);	break;

    case 3: L4:		LARGER(4);	/* FALLTHRU */
    case 5 ... 7: L8:	LARGER(8);	/* FALLTHRU */
    case 9 ... 15: L16:	LARGER(16);	break;

    Lfinish:
      post_barrier (smodel);
      memcpy (rptr, u.b + r, n);
      return;
    }

  pre_seq_barrier (smodel);
  libat_lock_n (mptr, n);

  if (vptr != rptr)
    {
      memcpy (rptr, mptr, n);
      memcpy (mptr, vptr, n);
    }
  else
    libat_exchange_large_inplace (n, mptr, vptr);

  libat_unlock_n (mptr, n);
  post_seq_barrier (smodel);
}

示例#9

文件： cas_n.c 项目： android-ide/toolchain-gcc

bool
SIZE(libat_compare_exchange) (UTYPE *mptr, UTYPE *eptr, UTYPE newval,
			      int smodel, int fmodel UNUSED)
{
  UTYPE oldval;
  UWORD magic;
  bool ret;

  pre_seq_barrier (smodel);
  magic = protect_start (mptr);

  oldval = *mptr;
  ret = (oldval == *eptr);
  if (ret)
      *mptr = newval;
  else
  *eptr = oldval;

  protect_end (mptr, magic);
  post_seq_barrier (smodel);

  return ret;
}