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- This comparison shows the changes necessary to convert path
/openrisc/tags/gnu-dev/fsf-gcc-snapshot-1-mar-12/or1k-gcc/libjava/sysdep/sh
- from Rev 764 to Rev 783
- ↔ Reverse comparison
Rev 764 → Rev 783
/locks.h
0,0 → 1,84
// locks.h - Thread synchronization primitives. SuperH implementation. |
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/* Copyright (C) 2002, 2007 Free Software Foundation |
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This file is part of libgcj. |
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This software is copyrighted work licensed under the terms of the |
Libgcj License. Please consult the file "LIBGCJ_LICENSE" for |
details. */ |
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#ifndef __SYSDEP_LOCKS_H__ |
#define __SYSDEP_LOCKS_H__ |
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typedef size_t obj_addr_t; /* Integer type big enough for object */ |
/* address. */ |
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static unsigned char __cas_lock = 0; |
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inline static void |
__cas_start_atomic (void) |
{ |
unsigned int val; |
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do |
__asm__ __volatile__ ("tas.b @%1; movt %0" |
: "=r" (val) |
: "r" (&__cas_lock) |
: "memory"); |
while (val == 0); |
} |
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inline static void |
__cas_end_atomic (void) |
{ |
__asm__ __volatile__ (" " : : : "memory"); |
__cas_lock = 0; |
} |
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inline static bool |
compare_and_swap (volatile obj_addr_t *addr, obj_addr_t old, |
obj_addr_t new_val) |
{ |
bool ret; |
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__cas_start_atomic (); |
if (*addr != old) |
ret = false; |
else |
{ |
*addr = new_val; |
ret = true; |
} |
__cas_end_atomic (); |
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return ret; |
} |
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inline static void |
release_set (volatile obj_addr_t *addr, obj_addr_t new_val) |
{ |
__asm__ __volatile__ (" " : : : "memory"); |
*(addr) = new_val; |
} |
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inline static bool |
compare_and_swap_release (volatile obj_addr_t *addr, obj_addr_t old, |
obj_addr_t new_val) |
{ |
return compare_and_swap (addr, old, new_val); |
} |
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inline static void |
read_barrier() |
{ |
__asm__ __volatile__(" " : : : "memory"); |
} |
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inline static void |
write_barrier() |
{ |
__asm__ __volatile__(" " : : : "memory"); |
} |
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#endif /* ! __SYSDEP_LOCKS_H__ */ |