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| 62 | #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) |
62 | #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) |
| 63 | #endif |
63 | #endif |
| 64 | #endif |
64 | #endif |
| 65 | |
65 | |
| 66 | /*****************************************************************************/ |
66 | /*****************************************************************************/ |
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67 | |
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68 | /* ECB_NO_THREADS - ecb is not used by multiple threads, ever */ |
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69 | /* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */ |
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70 | |
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71 | #if ECB_NO_THREADS || ECB_NO_SMP |
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72 | #define ECB_MEMORY_FENCE do { } while (0) |
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73 | #define ECB_MEMORY_FENCE_ACQUIRE do { } while (0) |
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74 | #define ECB_MEMORY_FENCE_RELEASE do { } while (0) |
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75 | #endif |
| 67 | |
76 | |
| 68 | #ifndef ECB_MEMORY_FENCE |
77 | #ifndef ECB_MEMORY_FENCE |
| 69 | #if ECB_GCC_VERSION(2,5) |
78 | #if ECB_GCC_VERSION(2,5) |
| 70 | #if __x86 |
79 | #if __x86 |
| 71 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") |
80 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") |
