From 952987a0cb9b1973fdf23e05f8ddc6fe3c98fd68 Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Fri, 1 Apr 2011 22:35:20 -0400 Subject: [PATCH] reorganize the __libc structure for threaded performance issues 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. --- src/internal/libc.h | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/src/internal/libc.h b/src/internal/libc.h index c83fcafe..60a25eff 100644 --- a/src/internal/libc.h +++ b/src/internal/libc.h @@ -5,20 +5,20 @@ #include struct __libc { - void (*lock)(volatile int *); + int *(*errno_location)(void); void (*cancelpt)(int); + void (*lock)(volatile int *); + void (*lockfile)(FILE *); + void (**tsd_keys)(void *); + void (*sigtimer)(); int (*atexit)(void (*)(void)); void (*fini)(void); void (*ldso_fini)(void); - int *(*errno_location)(void); volatile int threads_minus_1; + int ofl_lock; int (*rsyscall)(int, long, long, long, long, long, long); - void (**tsd_keys)(void *); void (*fork_handler)(int); FILE *ofl_head; - int ofl_lock; - void (*lockfile)(FILE *); - void (*sigtimer)(); }; -- 2.25.1