diff options
Diffstat (limited to 'innobase/include/sync0sync.ic')
| -rw-r--r-- | innobase/include/sync0sync.ic | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/innobase/include/sync0sync.ic b/innobase/include/sync0sync.ic index a937ac5d579..5a872c6b093 100644 --- a/innobase/include/sync0sync.ic +++ b/innobase/include/sync0sync.ic @@ -86,6 +86,20 @@ mutex_test_and_set( /* mutex_fence(); */ return(res); +#elif defined(__GNUC__) && defined(UNIV_INTEL_X86) + ulint* lw; + ulint res; + + lw = &(mutex->lock_word); + + /* In assembly we use the so-called AT & T syntax where + the order of operands is inverted compared to the ordinary Intel + syntax. The 'l' after the mnemonics denotes a 32-bit operation. */ + + asm volatile("movl $1, %%eax; xchgl (%%ecx), %%eax" : + "=eax" (res): + "ecx" (lw)); + return(res); #else ibool ret; @@ -120,9 +134,10 @@ mutex_reset_lock_word( __asm XCHG EDX, DWORD PTR [ECX] #else mutex->lock_word = 0; - +#if !(defined(__GNUC__) && defined(UNIV_INTEL_X86)) os_fast_mutex_unlock(&(mutex->os_fast_mutex)); #endif +#endif } /********************************************************************** |