gccã§atomicãª64bit setを実ç¾ã—ãŸã„ - グニャラãã‚“ã®ã‚°ãƒ‹ãƒ£ã‚°ãƒ‹ãƒ£å‚™å¿˜éŒ²@ã¯ã¦ãªgccã§atomicã«64bitã®å€¤ã‚’代入ã—ãŸã„。 一応ã€ä»¥ä¸‹ã®ã‚ˆã†ãªã‚³ãƒ¼ãƒ‰ã§å®Ÿç¾ã¯ã§ãã‚‹ã‚“ã ã‘ã©ã€‚。 #include <stdio.h> #include <stdint.h> #define SEN_SET_64BIT(p,v) \ __asm__ __volatile__ ("1:\n" \ "\tmovl (%0), %%eax\n" \ "\tmovl 4(%0), %%edx\n" \ "\tlock; cmpxchg8b (%0)\n" \ "\tjnz 1b\n" \ : \ : "D"(p), "b"(*(((uint32_t *)&(v))+0)), "c"(*(((uint32_t *)&(v))+1)) \ : "ax", "dx", "memory"); int main (int argc, char *argv[]) { uint64_t a = 0x012
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