haiku/headers/private/libroot/pthread_private.h

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/*
* Copyright 2003-2009, Axel Dörfler, axeld@pinc-software.de.
* Copyright 2007, Ryan Leavengood, leavengood@gmail.com.
* All rights reserved. Distributed under the terms of the MIT License.
*/
#ifndef _PTHREAD_PRIVATE_H_
#define _PTHREAD_PRIVATE_H_
#include <pthread.h>
#include <OS.h>
// _pthread_thread::flags values
#define THREAD_DETACHED 0x01
#define THREAD_DEAD 0x02
#define THREAD_CANCELED 0x04
#define THREAD_CANCEL_ENABLED 0x08
#define THREAD_CANCEL_ASYNCHRONOUS 0x10
struct thread_creation_attributes;
// The public *_t types are only pointers to these structures
// This way, we are completely free to change them, which might be
// necessary in the future (not only due to the incomplete implementation
// at this point).
typedef struct _pthread_condattr {
bool process_shared;
clockid_t clock_id;
} pthread_condattr;
typedef struct _pthread_mutexattr {
int32 type;
bool process_shared;
} pthread_mutexattr;
typedef struct _pthread_barrierattr {
bool process_shared;
} pthread_barrierattr;
typedef struct _pthread_attr {
int32 detach_state;
int32 sched_priority;
size_t stack_size;
size_t guard_size;
void *stack_address;
} pthread_attr;
typedef struct _pthread_rwlockattr {
uint32_t flags;
} pthread_rwlockattr;
typedef void (*pthread_key_destructor)(void *data);
struct pthread_key {
int32 sequence;
pthread_key_destructor destructor;
};
struct pthread_key_data {
int32 sequence;
void *value;
};
#define PTHREAD_UNUSED_SEQUENCE 0
typedef struct _pthread_thread {
thread_id id;
int32 flags;
void *(*entry)(void*);
void *entry_argument;
void *exit_value;
struct pthread_key_data specific[PTHREAD_KEYS_MAX];
struct __pthread_cleanup_handler *cleanup_handlers;
} pthread_thread;
#ifdef __cplusplus
extern "C" {
#endif
void __pthread_key_call_destructors(pthread_thread *thread);
void __pthread_destroy_thread(void);
pthread_thread *__allocate_pthread(void* (*entry)(void*), void *data);
void __init_pthread(pthread_thread* thread, void* (*entry)(void*), void* data);
status_t __pthread_init_creation_attributes(
const pthread_attr_t* pthreadAttributes, pthread_t thread,
status_t (*entryFunction)(void*, void*), void* argument1,
void* argument2, const char* name,
struct thread_creation_attributes* attributes);
libroot: add [gs]etpriority implementation Implemented against POSIX-1.2013. The implementation POSIX requirement thats setpriority() shall affect the priority of all system scope threads only extends to POSIX threads. This is implemented by modifying the default attributes for newly spawned pthreads. It is not possible to modify the default pthread attributes for different processes with the current implementation, as default pthread attributes are implemented in user-space. As a result, PRIO_PROCESS for which and 0 for who is the only supported combination for setpriority(). While it is possible to move the default attributes to the kernel, it is chosen not to so as to keep the pthread implementation user-space only. POSIX requires that lowering the nice value (increasing priority) can be done only by processes with appropriate privileges. However, as Haiku currently doesn't harbor any restrictions in setting the thread priority, this is not implemented. It is possible to have small precision errors when converting from Unix- style thread priority to Be-style. For example, the following program outputs "17" instead of the expected "18": #include <stdio.h> #include <sys/resource.h> int main() { setpriority(PRIO_PROCESS, 0, 18); printf("%d\n", getpriority(PRIO_PROCESS, 0)); return 0; } The underlying reason is because when you setpriority() both 18 and 19 are converted to the Be-style "2". This problem should not happen with priority levels lower than or equal to 20, when the Be notation is more precise than the Unix-style. Done as a part of GCI 2014. Fixes #2817. Signed-off-by: Timothy Gu <timothygu99@gmail.com> Co-authored-by: Leorize <leorize+oss@disroot.org> Change-Id: Ie14f105b00fe8563d16b3562748e1c2e56c873a6 Reviewed-on: https://review.haiku-os.org/c/78 Reviewed-by: Jérôme Duval <jerome.duval@gmail.com> Reviewed-by: waddlesplash <waddlesplash@gmail.com>
2019-01-09 05:26:42 +03:00
void __pthread_set_default_priority(int32 priority);
status_t __pthread_mutex_lock(pthread_mutex_t* mutex, bigtime_t timeout);
#ifdef __cplusplus
}
#endif
#endif /* _PTHREAD_PRIVATE_H_ */