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MDEV-33748 get rid of pthread_(get_/set_)specific, use thread_local

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Apart from better performance when accessing thread local variables,
we'll get rid of things that depend on initialization/cleanup of
pthread_key_t variables.

Where appropriate, use compiler-dependent pre-C++11 thread-local
equivalents, where it makes sense, to avoid initialization check overhead
that non-static thread_local can suffer from.
This commit is contained in:
Vladislav Vaintroub
2024-06-07 16:20:10 +02:00
parent 68fed7e785
commit 7c5fdc9b6a
26 changed files with 93 additions and 234 deletions
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25
include/my_pthread.h
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@@ -109,14 +109,6 @@ int pthread_cancel(pthread_t thread);
#define HAVE_PTHREAD_ATTR_SETSTACKSIZE 1
#undef SAFE_MUTEX /* This will cause conflicts */
#define pthread_key(T,V) DWORD V
#define pthread_key_create(A,B) ((*A=TlsAlloc())==0xFFFFFFFF)
#define pthread_key_delete(A) TlsFree(A)
#define my_pthread_setspecific_ptr(T,V) (!TlsSetValue((T),(V)))
#define pthread_setspecific(A,B) (!TlsSetValue((A),(LPVOID)(B)))
#define pthread_getspecific(A) (TlsGetValue(A))
#define my_pthread_getspecific(T,A) ((T) TlsGetValue(A))
#define my_pthread_getspecific_ptr(T,V) ((T) TlsGetValue(V))
#define pthread_equal(A,B) ((A) == (B))
#define pthread_mutex_init(A,B) (InitializeCriticalSection(A),0)
@@ -154,9 +146,6 @@ int pthread_cancel(pthread_t thread);
#include <synch.h>
#endif
#define pthread_key(T,V) pthread_key_t V
#define my_pthread_getspecific_ptr(T,V) my_pthread_getspecific(T,(V))
#define my_pthread_setspecific_ptr(T,V) pthread_setspecific(T,(void*) (V))
#define pthread_detach_this_thread()
#define pthread_handler_t EXTERNC void *
typedef void *(* pthread_handler)(void *);
@@ -232,8 +221,6 @@ int sigwait(sigset_t *setp, int *sigp); /* Use our implementation */
#undef HAVE_GETHOSTBYADDR_R /* No definition */
#endif
#define my_pthread_getspecific(A,B) ((A) pthread_getspecific(B))
#ifndef HAVE_LOCALTIME_R
struct tm *localtime_r(const time_t *clock, struct tm *res);
#endif
@@ -248,17 +235,7 @@ struct tm *gmtime_r(const time_t *clock, struct tm *res);
#define pthread_condattr_destroy pthread_condattr_delete
#endif
/* FSU THREADS */
#if !defined(HAVE_PTHREAD_KEY_DELETE) && !defined(pthread_key_delete)
#define pthread_key_delete(A) pthread_dummy(0)
#endif
#if defined(HAVE_PTHREAD_ATTR_CREATE) && !defined(HAVE_SIGWAIT)
/* This is set on AIX_3_2 and Siemens unix (and DEC OSF/1 3.2 too) */
#define pthread_key_create(A,B) \
pthread_keycreate(A,(B) ?\
(pthread_destructor_t) (B) :\
(pthread_destructor_t) pthread_dummy)
#define pthread_attr_init(A) pthread_attr_create(A)
#define pthread_attr_destroy(A) pthread_attr_delete(A)
#define pthread_attr_setdetachstate(A,B) pthread_dummy(0)
@@ -723,7 +700,7 @@ extern uint my_thread_end_wait_time;
extern my_bool safe_mutex_deadlock_detector;
#define my_thread_var (_my_thread_var())
#define my_errno my_thread_var->thr_errno
int set_mysys_var(struct st_my_thread_var *mysys_var);
void set_mysys_var(struct st_my_thread_var *mysys_var);
/*