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Clean up more code

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The *NSYNC linked list API is good enough that it deserves to be part of
the C libray, so this change writes an improved version of it which uses
that offsetof() trick from the Linux Kernel. We vendor all of the *NSYNC
tests in third_party which helped confirm the needed refactoring is safe

This change also deletes more old code that didn't pan out. My goal here
is to work towards a vision where the Cosmopolitan core libraries become
less experimental and more focused on curation. This better reflects the
current level of quality we've managed to achieve.
This commit is contained in:
Justine Tunney 2023-07-06 06:57:28 -07:00
parent 88612a2cd7
commit 0a24b4fc3c
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268 changed files with 632 additions and 8688 deletions
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24
libc/thread/posixthread.internal.h
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@ -2,10 +2,10 @@
#define COSMOPOLITAN_LIBC_THREAD_POSIXTHREAD_INTERNAL_H_
#include "libc/calls/struct/sched_param.h"
#include "libc/calls/struct/sigset.h"
#include "libc/intrin/dll.h"
#include "libc/runtime/runtime.h"
#include "libc/thread/thread.h"
#include "libc/thread/tls.h"
#include "third_party/nsync/dll.h"
#define PT_OWNSTACK 1
#define PT_STATIC 2
@ -64,26 +64,28 @@ enum PosixThreadStatus {
kPosixThreadZombie,
};
#define POSIXTHREAD_CONTAINER(e) DLL_CONTAINER(struct PosixThread, list, e)
struct PosixThread {
int flags; // 0x00: see PT_* constants
_Atomic(int) cancelled; // 0x04: thread has bad beliefs
_Atomic(enum PosixThreadStatus) status;
_Atomic(int) ptid; // transitions 0 → tid
void *(*start)(void *); // creation callback
void *arg; // start's parameter
void *rc; // start's return value
char *altstack; // thread sigaltstack
char *tls; // bottom of tls allocation
struct CosmoTib *tib; // middle of tls allocation
nsync_dll_element_ list; // list of threads
jmp_buf exiter; // for pthread_exit
_Atomic(int) ptid; // transitions 0 → tid
void *(*start)(void *); // creation callback
void *arg; // start's parameter
void *rc; // start's return value
char *altstack; // thread sigaltstack
char *tls; // bottom of tls allocation
struct CosmoTib *tib; // middle of tls allocation
struct Dll list; // list of threads
jmp_buf exiter; // for pthread_exit
pthread_attr_t attr;
struct _pthread_cleanup_buffer *cleanup;
};
typedef void (*atfork_f)(void);
extern nsync_dll_list_ _pthread_list;
extern struct Dll *_pthread_list;
extern pthread_spinlock_t _pthread_lock;
extern _Atomic(pthread_key_dtor) _pthread_key_dtor[PTHREAD_KEYS_MAX] _Hide;