| … | |
… | |
| 64 | int32_t uint32_t int64_t uint64_t |
64 | int32_t uint32_t int64_t uint64_t |
| 65 | intptr_t uintptr_t ptrdiff_t |
65 | intptr_t uintptr_t ptrdiff_t |
| 66 | |
66 | |
| 67 | The macro C<ECB_PTRSIZE> is defined to the size of a pointer on this |
67 | The macro C<ECB_PTRSIZE> is defined to the size of a pointer on this |
| 68 | platform (currently C<4> or C<8>). |
68 | platform (currently C<4> or C<8>). |
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69 | |
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70 | =head2 LANGUAGE/COMPILER VERSIONS |
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71 | |
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72 | =over 4 |
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73 | |
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74 | =item ECB_C99 |
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75 | |
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76 | Expands to a true value (suitable for testing in by the preprocessor) |
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77 | if the environment claims to be C99 compliant. |
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78 | |
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79 | =item ECB_C11 |
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80 | |
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81 | Expands to a true value (suitable for testing in by the preprocessor) |
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82 | if the environment claims to be C11 compliant. |
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83 | |
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84 | =item ECB_GCC_VERSION(major,minor) |
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85 | |
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86 | Expands to a true value (suitable for testing in by the preprocessor) |
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87 | if the compiler used is GNU C and the version is the givne version, or |
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88 | higher. |
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89 | |
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90 | This macro tries to return false on compilers that claim to be GCC |
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91 | compatible but aren't. |
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92 | |
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93 | =back |
| 69 | |
94 | |
| 70 | =head2 GCC ATTRIBUTES |
95 | =head2 GCC ATTRIBUTES |
| 71 | |
96 | |
| 72 | A major part of libecb deals with GCC attributes. These are additional |
97 | A major part of libecb deals with GCC attributes. These are additional |
| 73 | attributes that you can assign to functions, variables and sometimes even |
98 | attributes that you can assign to functions, variables and sometimes even |
| … | |
… | |
| 581 | for (i = 0; i < ecb_array_length (primes); i++) |
606 | for (i = 0; i < ecb_array_length (primes); i++) |
| 582 | sum += primes [i]; |
607 | sum += primes [i]; |
| 583 | |
608 | |
| 584 | =back |
609 | =back |
| 585 | |
610 | |
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611 | =head2 SYMBOLS GOVERNING COMPILATION OF ECB.H ITSELF |
| 586 | |
612 | |
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613 | These symbols need to be defined before including F<ecb.h> the first time. |
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614 | |
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615 | =over 4 |
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616 | |
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617 | =item ECB_NO_THRADS |
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618 | |
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619 | If F<ecb.h> is never used from multiple threads, then this symbol can |
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620 | be defined, in which case memory fences (and similar constructs) are |
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621 | completely removed, leading to more efficient code and fewer dependencies. |
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622 | |
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623 | Setting this symbol to a true value implies C<ECB_NO_SMP>. |
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624 | |
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625 | =item ECB_NO_SMP |
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626 | |
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627 | The weaker version of C<ECB_NO_THREADS> - if F<ecb.h> is used from |
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628 | multiple threads, but never concurrently (e.g. if the system the program |
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629 | runs on has only a single CPU with a single core, no hyperthreading and so |
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630 | on), then this symbol can be defined, leading to more efficient code and |
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631 | fewer dependencies. |
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632 | |
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633 | =back |
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634 | |
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635 | |
