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LibC: Implement basic pthread mutexes

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This implementation is just calling sched_yield if it could not get
mutex. This is not optimal as it does not allow the CPU to idle, but it
works for now :)

Also I did not test this code at all, but it feels correct :D
This commit is contained in:
Bananymous
2025-04-20 03:01:33 +03:00
parent 3642eabac0
commit db9db2cc40
3 changed files with 198 additions and 21 deletions
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22
userspace/libraries/LibC/include/bits/pthread_types.h
View File

@@ -40,18 +40,24 @@ __BEGIN_DECLS
#endif
#undef __need_pthread_key_t
#if !defined(__pthread_mutex_t_defined) && (defined(__need_all_types) || defined(__need_pthread_mutex_t))
#define __pthread_mutex_t_defined 1
typedef int pthread_mutex_t;
#if !defined(__pthread_t_defined) && (defined(__need_all_types) || defined(__need_pthread_t))
#define __pthread_t_defined 1
typedef pid_t pthread_t;
#endif
#undef __need_pthread_mutex_t
#undef __need_pthread_t
#if !defined(__pthread_mutexattr_t_defined) && (defined(__need_all_types) || defined(__need_pthread_mutexattr_t))
#define __pthread_mutexattr_t_defined 1
typedef int pthread_mutexattr_t;
typedef struct { int type; bool shared; } pthread_mutexattr_t;
#endif
#undef __need_pthread_mutexattr_t
#if !defined(__pthread_mutex_t_defined) && (defined(__need_all_types) || defined(__need_pthread_mutex_t))
#define __pthread_mutex_t_defined 1
typedef struct { pthread_mutexattr_t attr; pthread_t locker; unsigned lock_depth; } pthread_mutex_t;
#endif
#undef __need_pthread_mutex_t
#if !defined(__pthread_once_t_defined) && (defined(__need_all_types) || defined(__need_pthread_once_t))
#define __pthread_once_t_defined 1
typedef int pthread_once_t;
@@ -70,12 +76,6 @@ __BEGIN_DECLS
#endif
#undef __need_pthread_rwlockattr_t
#if !defined(__pthread_t_defined) && (defined(__need_all_types) || defined(__need_pthread_t))
#define __pthread_t_defined 1
typedef pid_t pthread_t;
#endif
#undef __need_pthread_t
#if !defined(__pthread_spinlock_t_defined) && (defined(__need_all_types) || defined(__need_pthread_spinlock_t))
#define __pthread_spinlock_t_defined 1
typedef pthread_t pthread_spinlock_t;

21
userspace/libraries/LibC/include/pthread.h
View File

@@ -46,23 +46,26 @@ struct uthread
#define PTHREAD_CREATE_JOINABLE 8
#define PTHREAD_EXPLICIT_SCHED 9
#define PTHREAD_INHERIT_SCHED 10
#define PTHREAD_MUTEX_DEFAULT 11
#define PTHREAD_MUTEX_ERRORCHECK 12
#define PTHREAD_MUTEX_NORMAL 13
#define PTHREAD_MUTEX_RECURSIVE 14
#define PTHREAD_MUTEX_ROBUST 15
#define PTHREAD_MUTEX_STALLED 16
#define PTHREAD_ONCE_INIT 17
#define PTHREAD_PRIO_INHERIT 18
#define PTHREAD_PRIO_NONE 19
#define PTHREAD_PRIO_PROTECT 20
#define PTHREAD_PROCESS_SHARED 21
#define PTHREAD_PROCESS_PRIVATE 22
#define PTHREAD_SCOPE_PROCESS 23
#define PTHREAD_SCOPE_SYSTEM 24
#define PTHREAD_PROCESS_SHARED 0
#define PTHREAD_PROCESS_PRIVATE 1
#define PTHREAD_MUTEX_ROBUST 0
#define PTHREAD_MUTEX_STALLED 1
#define PTHREAD_MUTEX_DEFAULT 0
#define PTHREAD_MUTEX_ERRORCHECK 1
#define PTHREAD_MUTEX_NORMAL 2
#define PTHREAD_MUTEX_RECURSIVE 3
#define PTHREAD_COND_INITIALIZER (pthread_cond_t)0
#define PTHREAD_MUTEX_INITIALIZER (pthread_mutex_t)0
#define PTHREAD_MUTEX_INITIALIZER (pthread_mutex_t){ { PTHREAD_MUTEX_DEFAULT, false }, 0, 0 }
#define PTHREAD_RWLOCK_INITIALIZER (pthread_rwlock_t)0
int pthread_atfork(void (*prepare)(void), void (*parent)(void), void(*child)(void));