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Experimental pthread compatibility library

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This patch adds pthread compatibility by using libmthread.

To use this with a program using pthreads, you have to replace
  #include <pthread>
with
  #define _MTHREADIFY_PTHREADS
  #include <minix/mthreads>

This also changes the initialization function to be a constructor, which
is implicitly called before the call to main. This allows for
conformance with pthreads, while not paying a high price by checking on
each mthread_* call whether the library has been initialized or not.

As mthread_init is now a constructor, it also has been set as static, and
relevent calls removed from programs using it.

Change-Id: I2aa375db557958d2bee9a70d285aabb990c88f00
This commit is contained in:
Lionel Sambuc 2014-01-14 13:48:43 +01:00
parent 29b8e5ff06
commit d3d33afe9f
21 changed files with 306 additions and 93 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
distrib/sets/lists/minix/mi
View file

@ -1836,6 +1836,9 @@
./usr/lib/libm.so minix-sys
./usr/lib/libmthread.a minix-sys
./usr/lib/libmthread_pic.a minix-sys
./usr/lib/libmthread.so.0.0 minix-sys
./usr/lib/libmthread.so.0 minix-sys
./usr/lib/libmthread.so minix-sys
./usr/lib/libnetdriver.a minix-sys
./usr/lib/libnetdriver_pic.a minix-sys
./usr/lib/libnetsock.a minix-sys

96
include/minix/mthread.h
View file

@ -71,6 +71,7 @@ typedef struct {
#define MTHREAD_STACK_MIN MINSIGSTKSZ
#define MTHREAD_KEYS_MAX 128
__BEGIN_DECLS
/* allocate.c */
int mthread_create(mthread_thread_t *thread, mthread_attr_t *tattr, void
*(*proc)(void *), void *arg);
@ -138,8 +139,101 @@ int mthread_rwlock_wrlock(mthread_rwlock_t *rwlock);
int mthread_rwlock_unlock(mthread_rwlock_t *rwlock);
/* schedule.c */
void mthread_init(void);
int mthread_yield(void);
void mthread_yield_all(void);
__END_DECLS
#if defined(_MTHREADIFY_PTHREADS)
typedef mthread_thread_t pthread_t;
typedef mthread_once_t pthread_once_t;
typedef mthread_key_t pthread_key_t;
typedef mthread_cond_t pthread_cond_t;
typedef mthread_mutex_t pthread_mutex_t;
typedef mthread_condattr_t pthread_condattr_t;
typedef mthread_mutexattr_t pthread_mutexattr_t;
typedef mthread_attr_t pthread_attr_t;
typedef mthread_event_t pthread_event_t;
typedef mthread_rwlock_t pthread_rwlock_t;
/* LSC: No equivalent, so void* for now. */
typedef void *pthread_rwlockattr_t;
#define PTHREAD_ONCE_INIT 0
#define PTHREAD_MUTEX_INITIALIZER ((pthread_mutex_t) -1)
#define PTHREAD_COND_INITIALIZER ((pthread_cond_t) -1)
__BEGIN_DECLS
/* allocate.c */
int pthread_create(pthread_t *thread, pthread_attr_t *tattr, void
*(*proc)(void *), void *arg);
int pthread_detach(pthread_t thread);
int pthread_equal(pthread_t l, pthread_t r);
void pthread_exit(void *value);
int pthread_join(pthread_t thread, void **value);
int pthread_once(pthread_once_t *once, void (*proc)(void));
pthread_t pthread_self(void);
/* attribute.c */
int pthread_attr_destroy(pthread_attr_t *tattr);
int pthread_attr_getdetachstate(pthread_attr_t *tattr, int
*detachstate);
int pthread_attr_getstack(pthread_attr_t *tattr, void **stackaddr,
size_t *stacksize);
int pthread_attr_getstacksize(pthread_attr_t *tattr, size_t *stacksize);
int pthread_attr_init(pthread_attr_t *tattr);
int pthread_attr_setdetachstate(pthread_attr_t *tattr, int detachstate);
int pthread_attr_setstack(pthread_attr_t *tattr, void *stackaddr, size_t
stacksize);
int pthread_attr_setstacksize(pthread_attr_t *tattr, size_t stacksize);
/* condition.c */
int pthread_cond_broadcast(pthread_cond_t *cond);
int pthread_cond_destroy(pthread_cond_t *cond);
int pthread_cond_init(pthread_cond_t *cond, pthread_condattr_t *cattr);
int pthread_cond_signal(pthread_cond_t *cond);
int pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex);
/* key.c */
int pthread_key_create(pthread_key_t *key, void (*destructor)(void *));
int pthread_key_delete(pthread_key_t key);
void *pthread_getspecific(pthread_key_t key);
int pthread_setspecific(pthread_key_t key, void *value);
/* mutex.c */
int pthread_mutex_destroy(pthread_mutex_t *mutex);
int pthread_mutex_init(pthread_mutex_t *mutex, pthread_mutexattr_t
*mattr);
int pthread_mutex_lock(pthread_mutex_t *mutex);
int pthread_mutex_trylock(pthread_mutex_t *mutex);
int pthread_mutex_unlock(pthread_mutex_t *mutex);
/* event.c */
int pthread_event_destroy(pthread_event_t *event);
int pthread_event_init(pthread_event_t *event);
int pthread_event_wait(pthread_event_t *event);
int pthread_event_fire(pthread_event_t *event);
int pthread_event_fire_all(pthread_event_t *event);
/* rwlock.c */
int pthread_rwlock_destroy(pthread_rwlock_t *rwlock);
int pthread_rwlock_init(pthread_rwlock_t *rwlock,
pthread_rwlockattr_t *UNUSED(attr));
int pthread_rwlock_rdlock(pthread_rwlock_t *rwlock);
int pthread_rwlock_wrlock(pthread_rwlock_t *rwlock);
int pthread_rwlock_unlock(pthread_rwlock_t *rwlock);
/* schedule.c */
int pthread_yield(void);
int sched_yield(void);
void pthread_yield_all(void);
/* LSC: FIXME: Maybe we should really do something with those... */
#define pthread_mutexattr_init(u) (0)
#define pthread_mutexattr_destroy(u) (0)
#define PTHREAD_MUTEX_RECURSIVE 0
#define pthread_mutexattr_settype(x, y) (EINVAL)
__END_DECLS
#endif /* defined(_MTHREADIFY_PTHREADS) */
#endif

6
lib/Makefile
View file

@ -19,11 +19,14 @@ SUBDIR+= ../external/gpl3/gcc/lib/libgcc .WAIT
. endif
.endif
#LSC MINIX libc depends on libminlib because of minix/malloc-debug.c
#LSC MINIX libc depends on
# - libminlib because of minix/malloc-debug.c
# - libmthread because of sys/lib/libunwind
SUBDIR+= libminlib
SUBDIR+= .WAIT
SUBDIR+= libsys
SUBDIR+= libmthread
SUBDIR+= .WAIT
SUBDIR+= libc
@ -43,7 +46,6 @@ SUBDIR+= libasyn \
libinputdriver \
libminc \
libminixfs \
libmthread \
libnetdriver \
libsffs \
libtimers \

2
lib/libblockdriver/driver_mt.c
View file

@ -343,8 +343,6 @@ static void master_init(struct blockdriver *bdp)
assert(bdp != NULL);
assert(bdp->bdr_device != NULL);
mthread_init();
bdtab = bdp;
/* Initialize device-specific data structures. */

13
lib/libmthread/Makefile
View file

@ -5,14 +5,15 @@ LIB= mthread
SRCS= \
allocate.c \
attribute.c \
mutex.c \
event.c \
rwlock.c \
misc.c \
queue.c \
condition.c \
event.c \
key.c \
misc.c \
mutex.c \
pthread_compat.c \
queue.c \
rwlock.c \
scheduler.c \
key.c
WARNS?= 4

23
lib/libmthread/allocate.c
View file

@ -36,7 +36,6 @@ mthread_thread_t l;
mthread_thread_t r;
{
/* Compare two thread ids */
MTHREAD_CHECK_INIT(); /* Make sure mthreads is initialized */
return(l == r);
}
@ -54,8 +53,6 @@ void *arg;
/* Register procedure proc for execution in a thread. */
mthread_thread_t thread;
MTHREAD_CHECK_INIT(); /* Make sure mthreads is initialized */
if (proc == NULL)
return(EINVAL);
@ -88,7 +85,6 @@ mthread_thread_t detach;
* this thread are automatically freed.
*/
mthread_tcb_t *tcb;
MTHREAD_CHECK_INIT(); /* Make sure libmthread is initialized */
if (!isokthreadid(detach))
return(ESRCH);
@ -116,8 +112,6 @@ void *value;
/* Make a thread stop running and store the result value. */
mthread_tcb_t *tcb;
MTHREAD_CHECK_INIT(); /* Make sure libmthread is initialized */
tcb = mthread_find_tcb(current_thread);
if (tcb->m_state == MS_EXITING) /* Already stopping, nothing to do. */
@ -226,7 +220,7 @@ static int mthread_increase_thread_pool(void)
/*===========================================================================*
* mthread_init *
*===========================================================================*/
void mthread_init(void)
static void __attribute__((__constructor__, __used__)) mthread_init(void)
{
/* Initialize thread system; allocate thread structures and start creating
* threads.
@ -267,8 +261,6 @@ void **value;
mthread_tcb_t *tcb;
MTHREAD_CHECK_INIT(); /* Make sure libmthread is initialized */
if (!isokthreadid(join))
return(ESRCH);
else if (join == current_thread)
@ -323,8 +315,6 @@ void (*proc)(void);
{
/* Run procedure proc just once */
MTHREAD_CHECK_INIT(); /* Make sure libmthread is initialized */
if (once == NULL || proc == NULL)
return(EINVAL);
@ -341,8 +331,6 @@ mthread_thread_t mthread_self(void)
{
/* Return the thread id of the thread calling this function. */
MTHREAD_CHECK_INIT(); /* Make sure libmthread is initialized */
return(current_thread);
}
@ -529,3 +517,12 @@ static void mthread_trampoline(void)
mthread_exit(r);
}
/* pthread compatibility layer. */
__weak_alias(pthread_create, mthread_create)
__weak_alias(pthread_detach, mthread_detach)
__weak_alias(pthread_equal, mthread_equal)
__weak_alias(pthread_exit, mthread_exit)
__weak_alias(pthread_join, mthread_join)
__weak_alias(pthread_once, mthread_once)
__weak_alias(pthread_self, mthread_self)

29
lib/libmthread/attribute.c
View file

@ -46,8 +46,6 @@ mthread_attr_t *attr;
{
/* Invalidate attribute and deallocate resources. */
MTHREAD_CHECK_INIT(); /* Make sure mthreads is initialized */
if (attr == NULL)
return(EINVAL);
@ -72,8 +70,6 @@ mthread_attr_t *attr; /* Attribute */
/* Initialize the attribute to a known state. */
struct __mthread_attr *a;
MTHREAD_CHECK_INIT(); /* Make sure mthreads is initialized */
if (attr == NULL)
return(EAGAIN);
else if (mthread_attr_valid(attr))
@ -102,8 +98,6 @@ int *detachstate;
/* Get detachstate of a thread attribute */
struct __mthread_attr *a;
MTHREAD_CHECK_INIT(); /* Make sure mthreads is initialized */
if (attr == NULL)
return(EINVAL);
@ -127,8 +121,6 @@ int detachstate;
/* Set detachstate of a thread attribute */
struct __mthread_attr *a;
MTHREAD_CHECK_INIT(); /* Make sure mthreads is initialized */
if (attr == NULL)
return(EINVAL);
@ -156,8 +148,6 @@ size_t *stacksize;
/* Get stack attribute */
struct __mthread_attr *a;
MTHREAD_CHECK_INIT(); /* Make sure mthreads is initialized */
if (attr == NULL)
return(EINVAL);
@ -182,8 +172,6 @@ size_t *stacksize;
/* Get stack size attribute */
struct __mthread_attr *a;
MTHREAD_CHECK_INIT(); /* Make sure mthreads is initialized */
if (attr == NULL)
return(EINVAL);
@ -208,8 +196,6 @@ size_t stacksize;
/* Set stack attribute */
struct __mthread_attr *a;
MTHREAD_CHECK_INIT(); /* Make sure mthreads is initialized */
if (attr == NULL)
return(EINVAL);
@ -239,8 +225,6 @@ size_t stacksize;
/* Set stack size attribute */
struct __mthread_attr *a;
MTHREAD_CHECK_INIT(); /* Make sure mthreads is initialized */
if (attr == NULL)
return(EINVAL);
@ -283,8 +267,6 @@ mthread_attr_t *a;
/* Check to see if attribute is on the list of valid attributes */
struct __mthread_attr *loopitem;
MTHREAD_CHECK_INIT(); /* Make sure mthreads is initialized */
loopitem = va_front;
while (loopitem != NULL) {
@ -307,8 +289,6 @@ int mthread_attr_verify(void)
/* Return true when no attributes are in use */
struct __mthread_attr *loopitem;
MTHREAD_CHECK_INIT(); /* Make sure mthreads is initialized */
loopitem = va_front;
while (loopitem != NULL) {
@ -320,4 +300,13 @@ int mthread_attr_verify(void)
}
#endif
/* pthread compatibility layer. */
__weak_alias(pthread_attr_destroy, mthread_attr_destroy)
__weak_alias(pthread_attr_getdetachstate, mthread_attr_getdetachstate)
__weak_alias(pthread_attr_getstack, mthread_attr_getstack)
__weak_alias(pthread_attr_getstacksize, mthread_attr_getstacksize)
__weak_alias(pthread_attr_init, mthread_attr_init)
__weak_alias(pthread_attr_setdetachstate, mthread_attr_setdetachstate)
__weak_alias(pthread_attr_setstack, mthread_attr_setstack)
__weak_alias(pthread_attr_setstacksize, mthread_attr_setstacksize)

16
lib/libmthread/condition.c
View file

@ -58,8 +58,6 @@ mthread_cond_t *cond;
mthread_thread_t t;
mthread_tcb_t *tcb;
MTHREAD_CHECK_INIT(); /* Make sure libmthread is initialized */
if (cond == NULL)
return(EINVAL);
else if (!mthread_cond_valid(cond))
@ -89,8 +87,6 @@ mthread_cond_t *cond;
mthread_thread_t t;
mthread_tcb_t *tcb;
MTHREAD_CHECK_INIT(); /* Make sure libmthread is initialized */
if (cond == NULL)
return(EINVAL);
else if (!mthread_cond_valid(cond))
@ -126,8 +122,6 @@ mthread_condattr_t *cattr;
/* Initialize condition variable to a known state. cattr is ignored */
struct __mthread_cond *c;
MTHREAD_CHECK_INIT(); /* Make sure libmthread is initialized */
if (cond == NULL)
return(EINVAL);
else if (cattr != NULL)
@ -181,8 +175,6 @@ mthread_cond_t *cond;
mthread_thread_t t;
mthread_tcb_t *tcb;
MTHREAD_CHECK_INIT(); /* Make sure libmthread is initialized */
if (cond == NULL)
return(EINVAL);
else if (!mthread_cond_valid(cond))
@ -214,8 +206,6 @@ mthread_cond_t *c;
/* Check to see if cond is on the list of valid conditions */
struct __mthread_cond *loopitem;
MTHREAD_CHECK_INIT();
loopitem = vc_front;
while (loopitem != NULL) {
@ -237,8 +227,6 @@ int mthread_cond_verify(void)
{
/* Return true in case no condition variables are in use. */
MTHREAD_CHECK_INIT(); /* Make sure libmthread is initialized */
return(vc_front == NULL);
}
#endif
@ -256,8 +244,6 @@ mthread_mutex_t *mutex;
struct __mthread_cond *c;
struct __mthread_mutex *m;
MTHREAD_CHECK_INIT(); /* Make sure libmthread is initialized */
if (cond == NULL || mutex == NULL)
return(EINVAL);
@ -284,4 +270,6 @@ mthread_mutex_t *mutex;
return(0);
}
/* pthread compatibility layer. */
__weak_alias(pthread_cond_init, mthread_cond_init)

8
lib/libmthread/event.c
View file

@ -124,3 +124,11 @@ mthread_event_t *event; /* The event to be fired */
return mthread_mutex_unlock(&event->mutex);
}
/* pthread compatibility layer. */
__weak_alias(pthread_event_destroy, mthread_event_destroy)
__weak_alias(pthread_event_init, mthread_event_init)
__weak_alias(pthread_event_wait, mthread_event_wait)
__weak_alias(pthread_event_fire, mthread_event_fire)
__weak_alias(pthread_event_fire_all, mthread_event_fire_all)

14
lib/libmthread/key.c
View file

@ -34,7 +34,6 @@ int mthread_key_create(mthread_key_t *key, void (*destructor)(void *))
*/
mthread_key_t k;
MTHREAD_CHECK_INIT(); /* Make sure libmthread is initialized */
keys_used = 1;
/* We do not yet allocate storage space for the values here, because we can
@ -65,8 +64,6 @@ int mthread_key_delete(mthread_key_t key)
/* Free up a key, as well as any associated storage space.
*/
MTHREAD_CHECK_INIT(); /* Make sure libmthread is initialized */
if (key < 0 || key >= MTHREAD_KEYS_MAX || !keys[key].used)
return(EINVAL);
@ -85,8 +82,6 @@ void *mthread_getspecific(mthread_key_t key)
/* Get this thread's local value for the given key. The default is NULL.
*/
MTHREAD_CHECK_INIT(); /* Make sure libmthread is initialized */
if (key < 0 || key >= MTHREAD_KEYS_MAX || !keys[key].used)
return(NULL);
@ -109,8 +104,6 @@ int mthread_setspecific(mthread_key_t key, void *value)
*/
void **p;
MTHREAD_CHECK_INIT(); /* Make sure libmthread is initialized */
if (key < 0 || key >= MTHREAD_KEYS_MAX || !keys[key].used)
return(EINVAL);
@ -188,3 +181,10 @@ void mthread_cleanup_values(void)
}
} while (found);
}
/* pthread compatibility layer. */
__weak_alias(pthread_key_create, mthread_key_create)
__weak_alias(pthread_key_delete, mthread_key_delete)
__weak_alias(pthread_getspecific, mthread_getspecific)
__weak_alias(pthread_setspecific, mthread_setspecific)

16
lib/libmthread/mutex.c
View file

@ -56,8 +56,6 @@ mthread_mutex_t *mutex;
mthread_thread_t t;
mthread_tcb_t *tcb;
MTHREAD_CHECK_INIT(); /* Make sure mthreads is initialized */
if (mutex == NULL)
return(EINVAL);
@ -95,8 +93,6 @@ mthread_mutexattr_t *mattr; /* Mutex attribute */
struct __mthread_mutex *m;
MTHREAD_CHECK_INIT(); /* Make sure mthreads is initialized */
if (mutex == NULL)
return(EAGAIN);
else if (mattr != NULL)
@ -127,8 +123,6 @@ mthread_mutex_t *mutex; /* Mutex that is to be locked */
struct __mthread_mutex *m;
MTHREAD_CHECK_INIT(); /* Make sure mthreads is initialized */
if (mutex == NULL)
return(EINVAL);
@ -180,8 +174,6 @@ mthread_mutex_t *mutex; /* Mutex that is to be locked */
struct __mthread_mutex *m;
MTHREAD_CHECK_INIT(); /* Make sure mthreads is initialized */
if (mutex == NULL)
return(EINVAL);
@ -210,8 +202,6 @@ mthread_mutex_t *mutex; /* Mutex that is to be unlocked */
struct __mthread_mutex *m;
MTHREAD_CHECK_INIT(); /* Make sure mthreads is initialized */
if (mutex == NULL)
return(EINVAL);
@ -237,8 +227,6 @@ mthread_mutex_t *m;
/* Check to see if mutex is on the list of valid mutexes */
struct __mthread_mutex *loopitem;
MTHREAD_CHECK_INIT(); /* Make sure mthreads is initialized */
loopitem = vm_front;
while (loopitem != NULL) {
@ -262,8 +250,6 @@ int mthread_mutex_verify(void)
int r = 1;
struct __mthread_mutex *loopitem;
MTHREAD_CHECK_INIT(); /* Make sure mthreads is initialized */
#ifdef MTHREAD_STRICT
loopitem = vm_front;
@ -277,5 +263,3 @@ int mthread_mutex_verify(void)
return(r);
}
#endif

2
lib/libmthread/proto.h
View file

@ -38,10 +38,8 @@ void mthread_init_valid_mutexes(void);
#ifdef MTHREAD_STRICT
int mthread_mutex_valid(mthread_mutex_t *mutex);
# define MTHREAD_CHECK_INIT() mthread_init()
#else
# define mthread_mutex_valid(x) ((*x)->mm_magic == MTHREAD_INIT_MAGIC)
# define MTHREAD_CHECK_INIT()
#endif
#ifdef MDEBUG

145
lib/libmthread/pthread_compat.c Normal file
View file

@ -0,0 +1,145 @@
#define _MTHREADIFY_PTHREADS
#include <minix/mthread.h>
#include "global.h"
#include "proto.h"
/* WARNING:
* The following works under the hypothesis that we have only green threads,
* which implies that we have no preemption, unless explicit yield or possible
* calls done to mthread functions.
*
* This has impact on the fact we do not maintain a table of currently being
* initialized mutexes or condition variables, to prevent double initialization
* and/or TOCTU problems. TOCTU could appear between the test against the
* initializer value, and the actual initialization, which could lead to double
* initialization of the same mutex AND get two threads at the same time in the
* critical section as they both hold a (different) mutex.
*/
/*===========================================================================*
* pthread_mutex_init *
*===========================================================================*/
int pthread_mutex_init(pthread_mutex_t *mutex, pthread_mutexattr_t *mattr)
{
return mthread_mutex_init(mutex, mattr);
}
/*===========================================================================*
* pthread_mutex_destroy *
*===========================================================================*/
int pthread_mutex_destroy(pthread_mutex_t *mutex)
{
if (PTHREAD_MUTEX_INITIALIZER == *mutex) {
*mutex = NULL;
return 0;
}
return mthread_mutex_destroy(mutex);
}
/*===========================================================================*
* pthread_mutex_lock *
*===========================================================================*/
int pthread_mutex_lock(pthread_mutex_t *mutex)
{
if (PTHREAD_MUTEX_INITIALIZER == *mutex) {
mthread_mutex_init(mutex, NULL);
}
return mthread_mutex_lock(mutex);
}
/*===========================================================================*
* pthread_mutex_trylock *
*===========================================================================*/
int pthread_mutex_trylock(pthread_mutex_t *mutex)
{
if (PTHREAD_MUTEX_INITIALIZER == *mutex) {
mthread_mutex_init(mutex, NULL);
}
return pthread_mutex_trylock(mutex);
}
/*===========================================================================*
* pthread_mutex_unlock *
*===========================================================================*/
int pthread_mutex_unlock(pthread_mutex_t *mutex)
{
if (PTHREAD_MUTEX_INITIALIZER == *mutex) {
mthread_mutex_init(mutex, NULL);
}
return mthread_mutex_unlock(mutex);
}
/*===========================================================================*
* pthread_cond_init *
*===========================================================================*/
int pthread_cond_init(pthread_cond_t *cond, pthread_condattr_t *cattr)
{
return mthread_cond_init(cond, cattr);
}
/*===========================================================================*
* pthread_cond_broadcast *
*===========================================================================*/
int pthread_cond_broadcast(pthread_cond_t *cond)
{
if (PTHREAD_COND_INITIALIZER == *cond) {
mthread_cond_init(cond, NULL);
}
return mthread_cond_broadcast(cond);
}
/*===========================================================================*
* pthread_cond_destroy *
*===========================================================================*/
int pthread_cond_destroy(pthread_cond_t *cond)
{
if (PTHREAD_COND_INITIALIZER == *cond) {
*cond = NULL;
return 0;
}
return mthread_cond_destroy(cond);
}
/*===========================================================================*
* pthread_cond_signal *
*===========================================================================*/
int pthread_cond_signal(pthread_cond_t *cond)
{
if (PTHREAD_COND_INITIALIZER == *cond) {
mthread_cond_init(cond, NULL);
}
return mthread_cond_signal(cond);
}
/*===========================================================================*
* pthread_cond_wait *
*===========================================================================*/
int pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex)
{
if (PTHREAD_COND_INITIALIZER == *cond) {
mthread_cond_init(cond, NULL);
}
return mthread_cond_wait(cond, mutex);
}
/*===========================================================================*
* pthread_rwlock_init *
*===========================================================================*/
int pthread_rwlock_init(pthread_rwlock_t *rwlock, pthread_rwlockattr_t *UNUSED(attr))
{
return mthread_rwlock_init(rwlock);
}
#if !defined(__weak_alias)
#error __weak_alias is required to compile the pthread compat library
#endif

7
lib/libmthread/rwlock.c
View file

@ -128,3 +128,10 @@ mthread_rwlock_t *rwlock; /* The rwlock to be unlocked */
return r;
}
/* pthread compatibility layer. */
__weak_alias(pthread_rwlock_destroy, mthread_rwlock_destroy)
__weak_alias(pthread_rwlock_rdlock, mthread_rwlock_rdlock)
__weak_alias(pthread_rwlock_wrlock, mthread_rwlock_wrlock)
__weak_alias(pthread_rwlock_unlock, mthread_rwlock_unlock)

11
lib/libmthread/scheduler.c
View file

@ -38,8 +38,6 @@ void mthread_schedule(void)
mthread_tcb_t *new_tcb, *old_tcb;
ucontext_t *new_ctx, *old_ctx;
MTHREAD_CHECK_INIT(); /* Make sure libmthread is initialized */
old_thread = current_thread;
if (mthread_queue_isempty(&run_queue)) {
@ -154,8 +152,6 @@ int mthread_yield(void)
mthread_tcb_t *tcb;
mthread_thread_t t;
MTHREAD_CHECK_INIT(); /* Make sure libmthread is initialized */
/* Detached threads cannot clean themselves up. This is a perfect moment to
* do it */
for (t = (mthread_thread_t) 0; need_reset > 0 && t < no_threads; t++) {
@ -192,8 +188,6 @@ void mthread_yield_all(void)
* this function will lead to a deadlock.
*/
MTHREAD_CHECK_INIT(); /* Make sure libmthread is initialized */
if (yield_all) mthread_panic("Deadlock: two threads trying to yield_all");
yield_all = 1;
@ -214,3 +208,8 @@ void mthread_yield_all(void)
yield_all = 0;
}
/* pthread compatibility layer. */
__weak_alias(pthread_yield, mthread_yield)
__weak_alias(sched_yield, mthread_yield)
__weak_alias(pthread_yield_all, mthread_yield_all)

2
lib/libmthread/shlib_version Normal file
View file

@ -0,0 +1,2 @@
major=0
minor=0

1
servers/vfs/threads.h
View file

@ -7,7 +7,6 @@
#define cond_t mthread_cond_t
#define attr_t mthread_attr_t
#define threads_init mthread_init
#define yield mthread_yield
#define yield_all mthread_yield_all

1
servers/vfs/worker.c
View file

@ -24,7 +24,6 @@ void worker_init(void)
struct worker_thread *wp;
int i;
threads_init();
if (mthread_attr_init(&tattr) != 0)
panic("failed to initialize attribute");
if (mthread_attr_setstacksize(&tattr, TH_STACKSIZE) != 0)

2
share/mk/bsd.lib.mk
View file

@ -614,7 +614,7 @@ DPLIBC ?= ${DESTDIR}${LIBC_SO}
.endif
.else
.if ${LIB} != "c" && ${LIB:Mgcc*} == "" \
&& ${LIB} != "minlib" && ${LIB} != "sys" && ${LIB} != "minc" # Minix-specific libs
&& ${LIB} != "minlib" && ${LIB} != "sys" && ${LIB} != "minc" && ${LIB} != "mthread" # Minix-specific libs
.if !empty(LIBC_SO)
DPLIBC ?= ${DESTDIR}${LIBC_SO}
.endif

1
share/mk/bsd.prog.mk
View file

@ -221,6 +221,7 @@ LIB${_lib:tu}= ${DESTDIR}/usr/lib/lib${_lib:S/xx/++/:S/atf_c/atf-c/}.a
devman \
minc \
minlib \
mthread \
netdriver \
sffs \
sys \

1
test/test59.c
View file

@ -1116,7 +1116,6 @@ int main(void)
once = MTHREAD_ONCE_INIT;
start(59);
mthread_init();
test_scheduling();
test_mutex();
test_event();