locks.h

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#ifndef UTIL_LOCKS_H
#define UTIL_LOCKS_H
 
/* if you define your own LOCKRET before including locks.h, you can get most
 * locking functions without the dependency on log_err. */
#ifndef LOCKRET
#include "util/log.h"
#define LOCKRET(func) do {\
    int lockret_err;        \
    if( (lockret_err=(func)) != 0)      \
        log_err("%s at %d could not " #func ": %s", \
        __FILE__, __LINE__, strerror(lockret_err)); \
    } while(0)
#endif
 
#if defined(HAVE_PTHREAD) && defined(HAVE_PTHREAD_SPINLOCK_T) && defined(ENABLE_LOCK_CHECKS)
#  define USE_THREAD_DEBUG
#endif
 
#ifdef USE_THREAD_DEBUG
/******************* THREAD DEBUG ************************/
/* (some) checking; to detect races and deadlocks. */
#include "testcode/checklocks.h"
 
#else /* USE_THREAD_DEBUG */
#define lock_protect(lock, area, size) /* nop */
#define lock_unprotect(lock, area) /* nop */
#define lock_get_mem(lock) (0) /* nothing */
#define checklock_start() /* nop */
#define checklock_stop() /* nop */
 
#ifdef HAVE_PTHREAD
#include <pthread.h>
 
/******************* PTHREAD ************************/
 
typedef pthread_mutex_t lock_basic_type;
#define lock_basic_init(lock) LOCKRET(pthread_mutex_init(lock, NULL))
#define lock_basic_destroy(lock) LOCKRET(pthread_mutex_destroy(lock))
#define lock_basic_lock(lock) LOCKRET(pthread_mutex_lock(lock))
#define lock_basic_unlock(lock) LOCKRET(pthread_mutex_unlock(lock))
 
#ifndef HAVE_PTHREAD_RWLOCK_T
typedef pthread_mutex_t lock_rw_type;
#define lock_rw_init(lock) LOCKRET(pthread_mutex_init(lock, NULL))
#define lock_rw_destroy(lock) LOCKRET(pthread_mutex_destroy(lock))
#define lock_rw_rdlock(lock) LOCKRET(pthread_mutex_lock(lock))
#define lock_rw_wrlock(lock) LOCKRET(pthread_mutex_lock(lock))
#define lock_rw_unlock(lock) LOCKRET(pthread_mutex_unlock(lock))
#else /* HAVE_PTHREAD_RWLOCK_T */
typedef pthread_rwlock_t lock_rw_type;
#define lock_rw_init(lock) LOCKRET(pthread_rwlock_init(lock, NULL))
#define lock_rw_destroy(lock) LOCKRET(pthread_rwlock_destroy(lock))
#define lock_rw_rdlock(lock) LOCKRET(pthread_rwlock_rdlock(lock))
#define lock_rw_wrlock(lock) LOCKRET(pthread_rwlock_wrlock(lock))
#define lock_rw_unlock(lock) LOCKRET(pthread_rwlock_unlock(lock))
#endif /* HAVE_PTHREAD_RWLOCK_T */
 
#ifndef HAVE_PTHREAD_SPINLOCK_T
typedef pthread_mutex_t lock_quick_type;
#define lock_quick_init(lock) LOCKRET(pthread_mutex_init(lock, NULL))
#define lock_quick_destroy(lock) LOCKRET(pthread_mutex_destroy(lock))
#define lock_quick_lock(lock) LOCKRET(pthread_mutex_lock(lock))
#define lock_quick_unlock(lock) LOCKRET(pthread_mutex_unlock(lock))
 
#else /* HAVE_PTHREAD_SPINLOCK_T */
typedef pthread_spinlock_t lock_quick_type;
#define lock_quick_init(lock) LOCKRET(pthread_spin_init(lock, PTHREAD_PROCESS_PRIVATE))
#define lock_quick_destroy(lock) LOCKRET(pthread_spin_destroy(lock))
#define lock_quick_lock(lock) LOCKRET(pthread_spin_lock(lock))
#define lock_quick_unlock(lock) LOCKRET(pthread_spin_unlock(lock))
 
#endif /* HAVE SPINLOCK */
 
typedef pthread_t ub_thread_type;
#define PTHREADSTACKSIZE 2*1024*1024
#define PTHREADCREATE(thr, stackrequired, func, arg) do {\
    pthread_attr_t attr; \
    size_t stacksize; \
    LOCKRET(pthread_attr_init(&attr)); \
    LOCKRET(pthread_attr_getstacksize(&attr, &stacksize)); \
    if (stacksize < stackrequired) { \
        LOCKRET(pthread_attr_setstacksize(&attr, stackrequired)); \
        LOCKRET(pthread_create(thr, &attr, func, arg)); \
        LOCKRET(pthread_attr_getstacksize(&attr, &stacksize)); \
        verbose(VERB_ALGO, "Thread stack size set to %u", (unsigned)stacksize); \
    } else {LOCKRET(pthread_create(thr, NULL, func, arg));} \
    } while(0)
#define ub_thread_create(thr, func, arg) PTHREADCREATE(thr, PTHREADSTACKSIZE, func, arg)
#define ub_thread_self() pthread_self()
#define ub_thread_join(thread) LOCKRET(pthread_join(thread, NULL))
typedef pthread_key_t ub_thread_key_type;
#define ub_thread_key_create(key, f) LOCKRET(pthread_key_create(key, f))
#define ub_thread_key_set(key, v) LOCKRET(pthread_setspecific(key, v))
#define ub_thread_key_get(key) pthread_getspecific(key)
 
#else /* we do not HAVE_PTHREAD */
#ifdef HAVE_SOLARIS_THREADS
 
/******************* SOLARIS THREADS ************************/
#include <synch.h>
#include <thread.h>
 
typedef rwlock_t lock_rw_type;
#define lock_rw_init(lock) LOCKRET(rwlock_init(lock, USYNC_THREAD, NULL))
#define lock_rw_destroy(lock) LOCKRET(rwlock_destroy(lock))
#define lock_rw_rdlock(lock) LOCKRET(rw_rdlock(lock))
#define lock_rw_wrlock(lock) LOCKRET(rw_wrlock(lock))
#define lock_rw_unlock(lock) LOCKRET(rw_unlock(lock))
 
typedef mutex_t lock_basic_type;
#define lock_basic_init(lock) LOCKRET(mutex_init(lock, USYNC_THREAD, NULL))
#define lock_basic_destroy(lock) LOCKRET(mutex_destroy(lock))
#define lock_basic_lock(lock) LOCKRET(mutex_lock(lock))
#define lock_basic_unlock(lock) LOCKRET(mutex_unlock(lock))
 
typedef mutex_t lock_quick_type;
#define lock_quick_init(lock) LOCKRET(mutex_init(lock, USYNC_THREAD, NULL))
#define lock_quick_destroy(lock) LOCKRET(mutex_destroy(lock))
#define lock_quick_lock(lock) LOCKRET(mutex_lock(lock))
#define lock_quick_unlock(lock) LOCKRET(mutex_unlock(lock))
 
typedef thread_t ub_thread_type;
#define ub_thread_create(thr, func, arg) LOCKRET(thr_create(NULL, NULL, func, arg, NULL, thr))
#define ub_thread_self() thr_self()
#define ub_thread_join(thread) LOCKRET(thr_join(thread, NULL, NULL))
typedef thread_key_t ub_thread_key_type;
#define ub_thread_key_create(key, f) LOCKRET(thr_keycreate(key, f))
#define ub_thread_key_set(key, v) LOCKRET(thr_setspecific(key, v))
void* ub_thread_key_get(ub_thread_key_type key);
 
 
#else /* we do not HAVE_SOLARIS_THREADS and no PTHREADS */
/******************* WINDOWS THREADS ************************/
#ifdef HAVE_WINDOWS_THREADS
#include <windows.h>
 
/* Use a mutex */
typedef LONG lock_rw_type;
#define lock_rw_init(lock) lock_basic_init(lock)
#define lock_rw_destroy(lock) lock_basic_destroy(lock)
#define lock_rw_rdlock(lock) lock_basic_lock(lock)
#define lock_rw_wrlock(lock) lock_basic_lock(lock)
#define lock_rw_unlock(lock) lock_basic_unlock(lock)
 
typedef LONG lock_basic_type;
void lock_basic_init(lock_basic_type* lock);
void lock_basic_destroy(lock_basic_type* lock);
void lock_basic_lock(lock_basic_type* lock);
void lock_basic_unlock(lock_basic_type* lock);
 
typedef LONG lock_quick_type;
#define lock_quick_init(lock) lock_basic_init(lock)
#define lock_quick_destroy(lock) lock_basic_destroy(lock)
#define lock_quick_lock(lock) lock_basic_lock(lock)
#define lock_quick_unlock(lock) lock_basic_unlock(lock)
 
typedef HANDLE ub_thread_type;
void ub_thread_create(ub_thread_type* thr, void* (*func)(void*), void* arg);
ub_thread_type ub_thread_self(void);
void ub_thread_join(ub_thread_type thr);
typedef DWORD ub_thread_key_type;
void ub_thread_key_create(ub_thread_key_type* key, void* f);
void ub_thread_key_set(ub_thread_key_type key, void* v);
void* ub_thread_key_get(ub_thread_key_type key);
 
#else /* we do not HAVE_SOLARIS_THREADS, PTHREADS or WINDOWS_THREADS */
 
/******************* NO THREADS ************************/
#define THREADS_DISABLED 1
typedef int lock_rw_type;
#define lock_rw_init(lock) /* nop */
#define lock_rw_destroy(lock) /* nop */
#define lock_rw_rdlock(lock) /* nop */
#define lock_rw_wrlock(lock) /* nop */
#define lock_rw_unlock(lock) /* nop */
 
typedef int lock_basic_type;
#define lock_basic_init(lock) /* nop */
#define lock_basic_destroy(lock) /* nop */
#define lock_basic_lock(lock) /* nop */
#define lock_basic_unlock(lock) /* nop */
 
typedef int lock_quick_type;
#define lock_quick_init(lock) /* nop */
#define lock_quick_destroy(lock) /* nop */
#define lock_quick_lock(lock) /* nop */
#define lock_quick_unlock(lock) /* nop */
 
typedef pid_t ub_thread_type;
#define ub_thread_create(thr, func, arg) \
    ub_thr_fork_create(thr, func, arg)
#define ub_thread_self() getpid()
#define ub_thread_join(thread) ub_thr_fork_wait(thread)
void ub_thr_fork_wait(ub_thread_type thread);
void ub_thr_fork_create(ub_thread_type* thr, void* (*func)(void*), void* arg);
typedef void* ub_thread_key_type;
#define ub_thread_key_create(key, f) (*(key)) = NULL
#define ub_thread_key_set(key, v) (key) = (v)
#define ub_thread_key_get(key) (key)
 
#endif /* HAVE_WINDOWS_THREADS */
#endif /* HAVE_SOLARIS_THREADS */
#endif /* HAVE_PTHREAD */
#endif /* USE_THREAD_DEBUG */
 
void ub_thread_blocksigs(void);
 
void ub_thread_sig_unblock(int sig);
 
#endif /* UTIL_LOCKS_H */