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reorganize the __libc structure for threaded performance issues

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we want to keep atomically updated fields (locks and thread count) and
really anything writable far away from frequently-needed function
pointers. stuff some rarely-needed function pointers in between to
pad, hopefully up to a cache line boundary.
This commit is contained in:
Rich Felker 2011-04-01 22:35:20 -04:00
commit 952987a0cb
1 changed files with 6 additions and 6 deletions
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12
src/internal/libc.h
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@ -5,20 +5,20 @@
#include <stdio.h> #include <stdio.h>
struct __libc { struct __libc {
void (*lock)(volatile int *); int *(*errno_location)(void);
void (*cancelpt)(int); void (*cancelpt)(int);
void (*lock)(volatile int *);
void (*lockfile)(FILE *);
void (**tsd_keys)(void *);
void (*sigtimer)();
int (*atexit)(void (*)(void)); int (*atexit)(void (*)(void));
void (*fini)(void); void (*fini)(void);
void (*ldso_fini)(void); void (*ldso_fini)(void);
int *(*errno_location)(void);
volatile int threads_minus_1; volatile int threads_minus_1;
int ofl_lock;
int (*rsyscall)(int, long, long, long, long, long, long); int (*rsyscall)(int, long, long, long, long, long, long);
void (**tsd_keys)(void *);
void (*fork_handler)(int); void (*fork_handler)(int);
FILE *ofl_head; FILE *ofl_head;
int ofl_lock;
void (*lockfile)(FILE *);
void (*sigtimer)();
}; };