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24 lines
405 B
C
24 lines
405 B
C
void __mutex_lock(volatile int *val)
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{
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int tmp;
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__asm__ __volatile__ (
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"0:\n\t"
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"mov %0, %1\n\t"
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"testl %1, %1\n\t"
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"jz 1f\n\t"
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"movl $68, %%eax\n\t"
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"movl $1, %%ebx\n\t"
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"int $0x40\n\t"
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"jmp 0b\n\t"
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"1:\n\t"
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"incl %1\n\t"
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"xchgl %0, %1\n\t"
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"testl %1, %1\n\t"
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"jnz 0b\n"
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: "+m" (*val), "=&r"(tmp)
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::"eax","ebx" );
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}
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