diff options
Diffstat (limited to 'libpthread/linuxthreads')
| -rw-r--r-- | libpthread/linuxthreads/internals.h | 82 |
1 files changed, 52 insertions, 30 deletions
diff --git a/libpthread/linuxthreads/internals.h b/libpthread/linuxthreads/internals.h index 623a0e891..194b41789 100644 --- a/libpthread/linuxthreads/internals.h +++ b/libpthread/linuxthreads/internals.h @@ -13,7 +13,7 @@ /* GNU Library General Public License for more details. */ #ifndef _INTERNALS_H -#define _INTERNALS_H 1 +#define _INTERNALS_H 1 /* Internal data structures */ @@ -24,6 +24,7 @@ #include <setjmp.h> #include <signal.h> #include <unistd.h> +#include <bits/stackinfo.h> #include <sys/types.h> #include "pt-machine.h" #include "semaphore.h" @@ -279,6 +280,11 @@ extern int __pthread_manager_request; extern int __pthread_manager_reader; +#ifdef FLOATING_STACKS +/* Maximum stack size. */ +extern size_t __pthread_max_stacksize; +#endif + /* Limits of the thread manager stack. */ extern char *__pthread_manager_thread_bos; @@ -298,6 +304,9 @@ extern volatile td_thr_events_t __pthread_threads_events; /* Pointer to descriptor of thread with last event. */ extern volatile pthread_descr __pthread_last_event; +/* Flag which tells whether we are executing on SMP kernel. */ +extern int __pthread_smp_kernel; + /* Return the handle corresponding to a thread id */ static inline pthread_handle thread_handle(pthread_t id) @@ -314,23 +323,17 @@ static inline int invalid_handle(pthread_handle h, pthread_t id) /* Fill in defaults left unspecified by pt-machine.h. */ +/* We round up a value with page size. */ +#ifndef page_roundup +#define page_roundup(v,p) ((((size_t) (v)) + (p) - 1) & ~((p) - 1)) +#endif + /* The page size we can get from the system. This should likely not be changed by the machine file but, you never know. */ extern size_t __pagesize; #include <bits/uClibc_page.h> #ifndef PAGE_SIZE -#define PAGE_SIZE (sysconf (_SC_PAGESIZE)) -#endif - -/* The max size of the thread stack segments. If the default - THREAD_SELF implementation is used, this must be a power of two and - a multiple of PAGE_SIZE. */ -#ifndef STACK_SIZE -#ifdef __ARCH_HAS_MMU__ -#define STACK_SIZE (2 * 1024 * 1024) -#else -#define STACK_SIZE (4 * __pagesize) -#endif +#define PAGE_SIZE (sysconf (_SC_PAGE_SIZE)) #endif /* The initial size of the thread stack. Must be a multiple of PAGE_SIZE. */ @@ -344,6 +347,17 @@ extern size_t __pagesize; #define THREAD_MANAGER_STACK_SIZE (2 * __pagesize - 32) #endif +/* The max size of the thread stack segments. If the default + THREAD_SELF implementation is used, this must be a power of two and + a multiple of PAGE_SIZE. */ +#ifndef STACK_SIZE +#ifdef __ARCH_HAS_MMU__ +#define STACK_SIZE (2 * 1024 * 1024) +#else +#define STACK_SIZE (4 * __pagesize) +#endif +#endif + /* The base of the "array" of thread stacks. The array will grow down from here. Defaults to the calculated bottom of the initial application stack. */ @@ -362,6 +376,7 @@ extern size_t __pagesize; x86). Still we need the compiler to respect the barrier and emit all outstanding operations which modify memory. Some architectures distinguish between full, read and write barriers. */ + #ifndef MEMORY_BARRIER #define MEMORY_BARRIER() asm ("" : : : "memory") #endif @@ -372,6 +387,30 @@ extern size_t __pagesize; #define WRITE_MEMORY_BARRIER() MEMORY_BARRIER() #endif +/* Max number of times we must spin on a spinlock calling sched_yield(). + After MAX_SPIN_COUNT iterations, we put the calling thread to sleep. */ + +#ifndef MAX_SPIN_COUNT +#define MAX_SPIN_COUNT 50 +#endif + +/* Max number of times the spinlock in the adaptive mutex implementation + spins actively on SMP systems. */ + +#ifndef MAX_ADAPTIVE_SPIN_COUNT +#define MAX_ADAPTIVE_SPIN_COUNT 100 +#endif + +/* Duration of sleep (in nanoseconds) when we can't acquire a spinlock + after MAX_SPIN_COUNT iterations of sched_yield(). + With the 2.0 and 2.1 kernels, this MUST BE > 2ms. + (Otherwise the kernel does busy-waiting for realtime threads, + giving other threads no chance to run.) */ + +#ifndef SPIN_SLEEP_DURATION +#define SPIN_SLEEP_DURATION 2000001 +#endif + /* Recover thread descriptor for the current thread */ extern pthread_descr __pthread_find_self (void) __attribute__ ((const)); @@ -420,23 +459,6 @@ static inline pthread_descr thread_self (void) #endif } -/* Max number of times we must spin on a spinlock calling sched_yield(). - After MAX_SPIN_COUNT iterations, we put the calling thread to sleep. */ - -#ifndef MAX_SPIN_COUNT -#define MAX_SPIN_COUNT 50 -#endif - -/* Duration of sleep (in nanoseconds) when we can't acquire a spinlock - after MAX_SPIN_COUNT iterations of sched_yield(). - With the 2.0 and 2.1 kernels, this MUST BE > 2ms. - (Otherwise the kernel does busy-waiting for realtime threads, - giving other threads no chance to run.) */ - -#ifndef SPIN_SLEEP_DURATION -#define SPIN_SLEEP_DURATION 2000001 -#endif - /* Debugging */ #ifdef DEBUG |