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glibc  2.9
Defines | Functions
pt-machine.h File Reference

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Defines

#define PT_EI   extern inline __attribute__ ((always_inline))
#define MEMORY_BARRIER()   __asm__ __volatile__ ("sync" : : : "memory")
#define FLOATING_STACKS   1
#define ARCH_STACK_MAX_SIZE   8*1024*1024
#define CURRENT_STACK_FRAME   stack_pointer
#define THREAD_SELF   __thread_self
#define INIT_THREAD_SELF(descr, nr)   (__thread_self = (descr))
#define THREAD_GETMEM(descr, member)   ((void) (descr), THREAD_SELF->member)
#define THREAD_GETMEM_NC(descr, member)   ((void) (descr), THREAD_SELF->member)
#define THREAD_SETMEM(descr, member, value)   ((void) (descr), THREAD_SELF->member = (value))
#define THREAD_SETMEM_NC(descr, member, value)   ((void) (descr), THREAD_SELF->member = (value))
#define HAS_COMPARE_AND_SWAP_WITH_RELEASE_SEMANTICS
#define IMPLEMENT_TAS_WITH_CAS

Functions

long int testandset (int *spinlock)
int __compare_and_swap (long int *p, long int oldval, long int newval)
register char *stack_pointer __asm__ ("r1")
register struct
_pthread_descr_struct
*__thread_self 
__asm__ ("r2")
PT_EI int __compare_and_swap_with_release_semantics (long int *p, long int oldval, long int newval)

Define Documentation

#define ARCH_STACK_MAX_SIZE   8*1024*1024

Definition at line 44 of file pt-machine.h.

#define CURRENT_STACK_FRAME   stack_pointer

Definition at line 48 of file pt-machine.h.

#define FLOATING_STACKS   1

Definition at line 41 of file pt-machine.h.

Definition at line 74 of file pt-machine.h.

Definition at line 75 of file pt-machine.h.

#define INIT_THREAD_SELF (   descr,
  nr 
)    (__thread_self = (descr))

Definition at line 59 of file pt-machine.h.

#define MEMORY_BARRIER ( )    __asm__ __volatile__ ("sync" : : : "memory")

Definition at line 38 of file pt-machine.h.

#define PT_EI   extern inline __attribute__ ((always_inline))

Definition at line 29 of file pt-machine.h.

#define THREAD_GETMEM (   descr,
  member 
)    ((void) (descr), THREAD_SELF->member)

Definition at line 62 of file pt-machine.h.

#define THREAD_GETMEM_NC (   descr,
  member 
)    ((void) (descr), THREAD_SELF->member)

Definition at line 64 of file pt-machine.h.

#define THREAD_SELF   __thread_self

Definition at line 56 of file pt-machine.h.

#define THREAD_SETMEM (   descr,
  member,
  value 
)    ((void) (descr), THREAD_SELF->member = (value))

Definition at line 66 of file pt-machine.h.

#define THREAD_SETMEM_NC (   descr,
  member,
  value 
)    ((void) (descr), THREAD_SELF->member = (value))

Definition at line 68 of file pt-machine.h.


Function Documentation

register char* stack_pointer __asm__ ( "r1"  )
register struct _pthread_descr_struct* __thread_self __asm__ ( "r2"  ) [read]
int __compare_and_swap ( long int p,
long int  oldval,
long int  newval 
) [inline]

Definition at line 100 of file pt-machine.h.

{
  long int ret;

  __asm__ __volatile__ (
       "/* Inline compare & swap */\n"
       "1:\t"
       "ldq_l %0,%4\n\t"
       "cmpeq %0,%2,%0\n\t"
       "beq %0,2f\n\t"
       "mov %3,%0\n\t"
       "stq_c %0,%1\n\t"
       "beq %0,1b\n\t"
       "2:\tmb\n"
       "/* End compare & swap */"
       : "=&r"(ret), "=m"(*p)
       : "r"(oldval), "r"(newval), "m"(*p)
        : "memory");

  return ret;
}
PT_EI int __compare_and_swap_with_release_semantics ( long int p,
long int  oldval,
long int  newval 
)

Definition at line 101 of file pt-machine.h.

{
  int ret;

  MEMORY_BARRIER ();
  __asm__ __volatile__ (
          "0:    lwarx %0,0,%1 ;"
          "      xor. %0,%3,%0;"
          "      bne 1f;"
          "      stwcx. %2,0,%1;"
          "      bne- 0b;"
          "1:    "
       : "=&r"(ret)
       : "r"(p), "r"(newval), "r"(oldval)
       : "cr0", "memory");
  return ret == 0;
}

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long int testandset ( int spinlock)

Definition at line 53 of file pt-machine.h.

{
  long int ret, temp;

  __asm__ __volatile__(
       "/* Inline spinlock test & set */\n"
       "1:\t"
       "ldl_l %0,%3\n\t"
       "bne %0,2f\n\t"
       "or $31,1,%1\n\t"
       "stl_c %1,%2\n\t"
       "beq %1,1b\n"
       "2:\tmb\n"
       "/* End spinlock test & set */"
       : "=&r"(ret), "=&r"(temp), "=m"(*spinlock)
       : "m"(*spinlock)
        : "memory");

  return ret;
}

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