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Diffstat (limited to 'include/my_global.h')
| -rw-r--r-- | include/my_global.h | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/include/my_global.h b/include/my_global.h index 969617c084b..56aeb84d9ba 100644 --- a/include/my_global.h +++ b/include/my_global.h @@ -110,6 +110,94 @@ #define unlikely(x) __builtin_expect((x),0) +/* + The macros below are useful in optimising places where it has been + discovered that cache misses stall the process and where a prefetch + of the cache line can improve matters. This is available in GCC 3.1.1 + and later versions. + PREFETCH_READ says that addr is going to be used for reading and that + it is to be kept in caches if possible for a while + PREFETCH_WRITE also says that the item to be cached is likely to be + updated. + The *LOCALITY scripts are also available for experimentation purposes + mostly and should only be used if they are verified to improve matters. + For more input see GCC manual (available in GCC 3.1.1 and later) +*/ + +#if (__GNUC__ > 3) || (__GNUC__ == 3 && __GNUC_MINOR > 10) +#define PREFETCH_READ(addr) __builtin_prefetch(addr, 0, 3) +#define PREFETCH_WRITE(addr) \ + __builtin_prefetch(addr, 1, 3) +#define PREFETCH_READ_LOCALITY(addr, locality) \ + __builtin_prefetch(addr, 0, locality) +#define PREFETCH_WRITE_LOCALITY(addr, locality) \ + __builtin_prefetch(addr, 1, locality) +#else +#define PREFETCH_READ(addr) +#define PREFETCH_READ_LOCALITY(addr, locality) +#define PREFETCH_WRITE(addr) +#define PREFETCH_WRITE_LOCALITY(addr, locality) +#endif + +/* + The following macro is used to ensure that code often used in most + SQL statements and definitely for parts of the SQL processing are + kept in a code segment by itself. This has the advantage that the + risk of common code being overlapping in caches of the CPU is less. + This can be a cause of big performance problems. + Routines should be put in this category with care and when they are + put there one should also strive to make as much of the error handling + as possible (or uncommon code of the routine) to execute in a + separate method to avoid moving to much code to this code segment. + + It is very easy to use, simply add HOT_METHOD at the end of the + function declaration. + For more input see GCC manual (available in GCC 2.95 and later) +*/ + +#if (__GNUC__ > 2) || (__GNUC__ == 2 && __GNUC_MINOR > 94) +#define HOT_METHOD \ + __attribute__ ((section ("hot_code_section"))) +#else +#define HOT_METHOD +#endif + +/* + The following macro is used to ensure that popular global variables + are located next to each other to avoid that they contend for the + same cache lines. + + It is very easy to use, simply add HOT_DATA at the end of the declaration + of the variable, the variable must be initialised because of the way + that linker works so a declaration using HOT_DATA should look like: + uint global_hot_data HOT_DATA = 0; + For more input see GCC manual (available in GCC 2.95 and later) +*/ + +#if (__GNUC__ > 2) || (__GNUC__ == 2 && __GNUC_MINOR > 94) +#define HOT_DATA \ + __attribute__ ((section ("hot_data_section"))) +#else +#define HOT_DATA +#endif + + +/* + The following macros are used to control inlining a bit more than + usual. These macros are used to ensure that inlining always or + never occurs (independent of compilation mode). + For more input see GCC manual (available in GCC 3.1.1 and later) +*/ + +#if (__GNUC__ > 3) || (__GNUC__ == 3 && __GNUC_MINOR > 10) +#define ALWAYS_INLINE __attribute__ ((always_inline)) +#define NEVER_INLINE __attribute__ ((noinline)) +#else +#define ALWAYS_INLINE +#define NEVER_INLINE +#endif + + /* Fix problem with S_ISLNK() on Linux */ #if defined(TARGET_OS_LINUX) #undef _GNU_SOURCE @@ -336,6 +424,9 @@ C_MODE_END #include <assert.h> /* Go around some bugs in different OS and compilers */ +#if defined (HPUX11) && defined(_LARGEFILE_SOURCE) +#define _LARGEFILE64_SOURCE +#endif #if defined(_HPUX_SOURCE) && defined(HAVE_SYS_STREAM_H) #include <sys/stream.h> /* HPUX 10.20 defines ulong here. UGLY !!! */ #define HAVE_ULONG @@ -762,6 +853,14 @@ typedef long my_ptrdiff_t; typedef long long my_ptrdiff_t; #endif +#if HAVE_SIZE_T +typedef size_t my_size_t; +#elif SIZEOF_CHARP <= SIZEOF_LONG +typedef unsigned long my_size_t; +#else +typedef unsigned long long my_size_t; +#endif + #define MY_ALIGN(A,L) (((A) + (L) - 1) & ~((L) - 1)) #define ALIGN_SIZE(A) MY_ALIGN((A),sizeof(double)) /* Size to make adressable obj. */ @@ -1043,6 +1142,12 @@ typedef char bool; /* Ordinary boolean values 0 1 */ (((uint32) ((uchar) (A)[2])) << 16) +\ (((uint32) ((uchar) (A)[3])) << 24)) +\ (((ulonglong) ((uchar) (A)[4])) << 32)) +#define uint6korr(A) ((ulonglong)(((uint32) ((uchar) (A)[0])) + \ + (((uint32) ((uchar) (A)[1])) << 8) + \ + (((uint32) ((uchar) (A)[2])) << 16) + \ + (((uint32) ((uchar) (A)[3])) << 24)) + \ + (((ulonglong) ((uchar) (A)[4])) << 32) + \ + (((ulonglong) ((uchar) (A)[5])) << 40)) #define uint8korr(A) (*((ulonglong *) (A))) #define sint8korr(A) (*((longlong *) (A))) #define int2store(T,A) *((uint16*) (T))= (uint16) (A) @@ -1055,6 +1160,12 @@ typedef char bool; /* Ordinary boolean values 0 1 */ *((T)+2)=(uchar) (((A) >> 16));\ *((T)+3)=(uchar) (((A) >> 24)); \ *((T)+4)=(uchar) (((A) >> 32)); } while(0) +#define int6store(T,A) do { *(T)= (uchar)((A)); \ + *((T)+1)=(uchar) (((A) >> 8)); \ + *((T)+2)=(uchar) (((A) >> 16)); \ + *((T)+3)=(uchar) (((A) >> 24)); \ + *((T)+4)=(uchar) (((A) >> 32)); \ + *((T)+5)=(uchar) (((A) >> 40)); } while(0) #define int8store(T,A) *((ulonglong *) (T))= (ulonglong) (A) typedef union { @@ -1111,6 +1222,12 @@ do { doubleget_union _tmp; \ (((uint32) ((uchar) (A)[2])) << 16) +\ (((uint32) ((uchar) (A)[3])) << 24)) +\ (((ulonglong) ((uchar) (A)[4])) << 32)) +#define uint6korr(A) ((ulonglong)(((uint32) ((uchar) (A)[0])) + \ + (((uint32) ((uchar) (A)[1])) << 8) + \ + (((uint32) ((uchar) (A)[2])) << 16) + \ + (((uint32) ((uchar) (A)[3])) << 24)) + \ + (((ulonglong) ((uchar) (A)[4])) << 32) + \ + (((ulonglong) ((uchar) (A)[5])) << 40)) #define uint8korr(A) ((ulonglong)(((uint32) ((uchar) (A)[0])) +\ (((uint32) ((uchar) (A)[1])) << 8) +\ (((uint32) ((uchar) (A)[2])) << 16) +\ @@ -1138,6 +1255,12 @@ do { doubleget_union _tmp; \ *(((char *)(T))+2)=(((A) >> 16));\ *(((char *)(T))+3)=(((A) >> 24)); \ *(((char *)(T))+4)=(((A) >> 32)); } while(0) +#define int6store(T,A) do { *((char *)(T))=((A));\ + *(((char *)(T))+1)=(((A) >> 8)); \ + *(((char *)(T))+2)=(((A) >> 16)); \ + *(((char *)(T))+3)=(((A) >> 24)); \ + *(((char *)(T))+4)=(((A) >> 32)); \ + *(((char *)(T))+5)=(((A) >> 40)); } while(0) #define int8store(T,A) do { uint def_temp= (uint) (A), def_temp2= (uint) ((A) >> 32); \ int4store((T),def_temp); \ int4store((T+4),def_temp2); } while(0) @@ -1301,4 +1424,32 @@ do { doubleget_union _tmp; \ #define NO_EMBEDDED_ACCESS_CHECKS #endif +#ifdef HAVE_DLOPEN +#if defined(__WIN__) +#define dlsym(lib, name) GetProcAddress((HMODULE)lib, name) +#define dlopen(libname, unused) LoadLibraryEx(libname, NULL, 0) +#define dlclose(lib) FreeLibrary((HMODULE)lib) +#elif defined(HAVE_DLFCN_H) +#include <dlfcn.h> +#endif +#endif + +/* FreeBSD 2.2.2 does not define RTLD_NOW) */ +#ifndef RTLD_NOW +#define RTLD_NOW 1 +#endif + +#ifndef HAVE_DLERROR +#define dlerror() "" +#endif + +/* FreeBSD 2.2.2 does not define RTLD_NOW) */ +#ifndef RTLD_NOW +#define RTLD_NOW 1 +#endif + +#ifndef HAVE_DLERROR +#define dlerror() "" +#endif + #endif /* my_global_h */ |