diff options
Diffstat (limited to 'sysdeps')
25 files changed, 415 insertions, 260 deletions
diff --git a/sysdeps/aarch64/nptl/bits/pthreadtypes-arch.h b/sysdeps/aarch64/nptl/bits/pthreadtypes-arch.h index 61c02e7bbc..78abd6960b 100644 --- a/sysdeps/aarch64/nptl/bits/pthreadtypes-arch.h +++ b/sysdeps/aarch64/nptl/bits/pthreadtypes-arch.h @@ -41,13 +41,6 @@ #define __SIZEOF_PTHREAD_COND_T 48 #define __SIZEOF_PTHREAD_RWLOCKATTR_T 8 -/* Definitions for internal mutex struct. */ -#define __PTHREAD_COMPAT_PADDING_MID -#define __PTHREAD_COMPAT_PADDING_END -#define __PTHREAD_MUTEX_LOCK_ELISION 0 -#define __PTHREAD_MUTEX_NUSERS_AFTER_KIND 0 -#define __PTHREAD_MUTEX_USE_UNION 0 - #define __LOCK_ALIGNMENT #define __ONCE_ALIGNMENT diff --git a/sysdeps/alpha/nptl/bits/pthreadtypes-arch.h b/sysdeps/alpha/nptl/bits/pthreadtypes-arch.h index f5b7d1940e..b832590d82 100644 --- a/sysdeps/alpha/nptl/bits/pthreadtypes-arch.h +++ b/sysdeps/alpha/nptl/bits/pthreadtypes-arch.h @@ -29,13 +29,6 @@ #define __SIZEOF_PTHREAD_BARRIER_T 32 #define __SIZEOF_PTHREAD_BARRIERATTR_T 4 -/* Definitions for internal mutex struct. */ -#define __PTHREAD_COMPAT_PADDING_MID -#define __PTHREAD_COMPAT_PADDING_END -#define __PTHREAD_MUTEX_LOCK_ELISION 0 -#define __PTHREAD_MUTEX_NUSERS_AFTER_KIND 0 -#define __PTHREAD_MUTEX_USE_UNION 0 - #define __LOCK_ALIGNMENT #define __ONCE_ALIGNMENT diff --git a/sysdeps/arm/nptl/bits/pthreadtypes-arch.h b/sysdeps/arm/nptl/bits/pthreadtypes-arch.h index a2c550f62a..5ae7d0d721 100644 --- a/sysdeps/arm/nptl/bits/pthreadtypes-arch.h +++ b/sysdeps/arm/nptl/bits/pthreadtypes-arch.h @@ -30,13 +30,6 @@ #define __SIZEOF_PTHREAD_BARRIER_T 20 #define __SIZEOF_PTHREAD_BARRIERATTR_T 4 -/* Data structure for mutex handling. */ -#define __PTHREAD_COMPAT_PADDING_MID -#define __PTHREAD_COMPAT_PADDING_END -#define __PTHREAD_MUTEX_LOCK_ELISION 0 -#define __PTHREAD_MUTEX_NUSERS_AFTER_KIND 1 -#define __PTHREAD_MUTEX_USE_UNION 1 - #define __LOCK_ALIGNMENT #define __ONCE_ALIGNMENT diff --git a/sysdeps/csky/nptl/bits/pthreadtypes-arch.h b/sysdeps/csky/nptl/bits/pthreadtypes-arch.h index c1656ae2f6..685515724f 100644 --- a/sysdeps/csky/nptl/bits/pthreadtypes-arch.h +++ b/sysdeps/csky/nptl/bits/pthreadtypes-arch.h @@ -31,13 +31,6 @@ #define __SIZEOF_PTHREAD_BARRIER_T 20 #define __SIZEOF_PTHREAD_BARRIERATTR_T 4 -/* Data structure for mutex handling. */ -#define __PTHREAD_COMPAT_PADDING_MID -#define __PTHREAD_COMPAT_PADDING_END -#define __PTHREAD_MUTEX_LOCK_ELISION 0 -#define __PTHREAD_MUTEX_NUSERS_AFTER_KIND 1 -#define __PTHREAD_MUTEX_USE_UNION 1 - #define __LOCK_ALIGNMENT #define __ONCE_ALIGNMENT diff --git a/sysdeps/hppa/nptl/bits/pthreadtypes-arch.h b/sysdeps/hppa/nptl/bits/pthreadtypes-arch.h index 7c97b89d60..c11add1af8 100644 --- a/sysdeps/hppa/nptl/bits/pthreadtypes-arch.h +++ b/sysdeps/hppa/nptl/bits/pthreadtypes-arch.h @@ -40,17 +40,6 @@ #define __SIZEOF_PTHREAD_RWLOCK_T 64 #define __SIZEOF_PTHREAD_RWLOCKATTR_T 8 -/* The old 4-word 16-byte aligned lock. This is initalized - to all ones by the Linuxthreads PTHREAD_MUTEX_INITIALIZER. - Unused in NPTL. */ -#define __PTHREAD_COMPAT_PADDING_MID int __compat_padding[4]; -/* Two more words are left before the NPTL - pthread_mutex_t is larger than Linuxthreads. */ -#define __PTHREAD_COMPAT_PADDING_END int __reserved[2]; -#define __PTHREAD_MUTEX_LOCK_ELISION 0 -#define __PTHREAD_MUTEX_NUSERS_AFTER_KIND 1 -#define __PTHREAD_MUTEX_USE_UNION 1 - #define __LOCK_ALIGNMENT __attribute__ ((__aligned__(16))) #define __ONCE_ALIGNMENT diff --git a/sysdeps/hppa/nptl/bits/struct_mutex.h b/sysdeps/hppa/nptl/bits/struct_mutex.h new file mode 100644 index 0000000000..7f81256fe3 --- /dev/null +++ b/sysdeps/hppa/nptl/bits/struct_mutex.h @@ -0,0 +1,53 @@ +/* HPPA internal mutex struct definitions. + Copyright (C) 2019 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#ifndef _THREAD_MUTEX_INTERNAL_H +#define _THREAD_MUTEX_INTERNAL_H 1 + +struct __pthread_mutex_s +{ + int __lock __LOCK_ALIGNMENT; + unsigned int __count; + int __owner; + /* KIND must stay at this position in the structure to maintain + binary compatibility with static initializers. */ + int __kind; + /* The old 4-word 16-byte aligned lock. This is initalized + to all ones by the Linuxthreads PTHREAD_MUTEX_INITIALIZER. + Unused in NPTL. */ + int __glibc_compat_padding[4]; + /* In the old structure there are 4 words left due to alignment. + In NPTL two words are used. */ + unsigned int __nusers; + __extension__ union + { + int __spins; + __pthread_slist_t __list; + }; + /* Two more words are left before the NPTL + pthread_mutex_t is larger than Linuxthreads. */ + int __glibc_reserved1; + int __glibc_reserved2; +}; + +#define __PTHREAD_MUTEX_HAVE_PREV 0 + +#define __PTHREAD_MUTEX_INITIALIZER(__kind) \ + 0, 0, 0, __kind, { 0, 0, 0, 0 }, 0, { 0 }, 0, 0 + +#endif diff --git a/sysdeps/ia64/nptl/bits/pthreadtypes-arch.h b/sysdeps/ia64/nptl/bits/pthreadtypes-arch.h index 8eb1bd5ebe..7a1fd3ed28 100644 --- a/sysdeps/ia64/nptl/bits/pthreadtypes-arch.h +++ b/sysdeps/ia64/nptl/bits/pthreadtypes-arch.h @@ -29,13 +29,6 @@ #define __SIZEOF_PTHREAD_BARRIER_T 32 #define __SIZEOF_PTHREAD_BARRIERATTR_T 4 -/* Definitions for internal mutex struct. */ -#define __PTHREAD_COMPAT_PADDING_MID -#define __PTHREAD_COMPAT_PADDING_END -#define __PTHREAD_MUTEX_LOCK_ELISION 0 -#define __PTHREAD_MUTEX_NUSERS_AFTER_KIND 0 -#define __PTHREAD_MUTEX_USE_UNION 0 - #define __LOCK_ALIGNMENT #define __ONCE_ALIGNMENT diff --git a/sysdeps/m68k/nptl/bits/pthreadtypes-arch.h b/sysdeps/m68k/nptl/bits/pthreadtypes-arch.h index cefce56593..0647c48b5a 100644 --- a/sysdeps/m68k/nptl/bits/pthreadtypes-arch.h +++ b/sysdeps/m68k/nptl/bits/pthreadtypes-arch.h @@ -31,13 +31,6 @@ #define __SIZEOF_PTHREAD_BARRIER_T 20 #define __SIZEOF_PTHREAD_BARRIERATTR_T 4 -/* Data structure for mutex handling. */ -#define __PTHREAD_COMPAT_PADDING_MID -#define __PTHREAD_COMPAT_PADDING_END -#define __PTHREAD_MUTEX_LOCK_ELISION 0 -#define __PTHREAD_MUTEX_NUSERS_AFTER_KIND 1 -#define __PTHREAD_MUTEX_USE_UNION 1 - #define __LOCK_ALIGNMENT __attribute__ ((__aligned__ (4))) #define __ONCE_ALIGNMENT __attribute__ ((__aligned__ (4))) diff --git a/sysdeps/microblaze/nptl/bits/pthreadtypes-arch.h b/sysdeps/microblaze/nptl/bits/pthreadtypes-arch.h index 00b50df227..21b090aaf6 100644 --- a/sysdeps/microblaze/nptl/bits/pthreadtypes-arch.h +++ b/sysdeps/microblaze/nptl/bits/pthreadtypes-arch.h @@ -31,13 +31,6 @@ # define __SIZEOF_PTHREAD_BARRIER_T 20 # define __SIZEOF_PTHREAD_BARRIERATTR_T 4 -/* Definitions for internal mutex struct. */ -#define __PTHREAD_COMPAT_PADDING_MID -#define __PTHREAD_COMPAT_PADDING_END -#define __PTHREAD_MUTEX_LOCK_ELISION 0 -#define __PTHREAD_MUTEX_NUSERS_AFTER_KIND 1 -#define __PTHREAD_MUTEX_USE_UNION 1 - #define __LOCK_ALIGNMENT #define __ONCE_ALIGNMENT diff --git a/sysdeps/mips/nptl/bits/pthreadtypes-arch.h b/sysdeps/mips/nptl/bits/pthreadtypes-arch.h index 629cd72048..5bcc90a7fe 100644 --- a/sysdeps/mips/nptl/bits/pthreadtypes-arch.h +++ b/sysdeps/mips/nptl/bits/pthreadtypes-arch.h @@ -38,13 +38,6 @@ #define __SIZEOF_PTHREAD_RWLOCKATTR_T 8 #define __SIZEOF_PTHREAD_BARRIERATTR_T 4 -/* Data structure for mutex handling. */ -#define __PTHREAD_COMPAT_PADDING_MID -#define __PTHREAD_COMPAT_PADDING_END -#define __PTHREAD_MUTEX_LOCK_ELISION 0 -#define __PTHREAD_MUTEX_NUSERS_AFTER_KIND (_MIPS_SIM != _ABI64) -#define __PTHREAD_MUTEX_USE_UNION (_MIPS_SIM != _ABI64) - #define __LOCK_ALIGNMENT #define __ONCE_ALIGNMENT diff --git a/sysdeps/mips/nptl/bits/struct_mutex.h b/sysdeps/mips/nptl/bits/struct_mutex.h new file mode 100644 index 0000000000..3307265b11 --- /dev/null +++ b/sysdeps/mips/nptl/bits/struct_mutex.h @@ -0,0 +1,56 @@ +/* MIPS internal mutex struct definitions. + Copyright (C) 2019 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#ifndef _THREAD_MUTEX_INTERNAL_H +#define _THREAD_MUTEX_INTERNAL_H 1 + +struct __pthread_mutex_s +{ + int __lock; + unsigned int __count; + int __owner; +#if _MIPS_SIM == _ABI64 + unsigned int __nusers; +#endif + /* KIND must stay at this position in the structure to maintain + binary compatibility with static initializers. */ + int __kind; +#if _MIPS_SIM == _ABI64 + int __spins; + __pthread_list_t __list; +# define __PTHREAD_MUTEX_HAVE_PREV 1 +#else + unsigned int __nusers; + __extension__ union + { + int __spins; + __pthread_slist_t __list; + }; +# define __PTHREAD_MUTEX_HAVE_PREV 0 +#endif +}; + +#if _MIPS_SIM == _ABI64 +# define __PTHREAD_MUTEX_INITIALIZER(__kind) \ + 0, 0, 0, 0, __kind, 0, { 0, 0 } +#else +# define __PTHREAD_MUTEX_INITIALIZER(__kind) \ + 0, 0, 0, __kind, 0, { 0 } +#endif + +#endif diff --git a/sysdeps/nios2/nptl/bits/pthreadtypes-arch.h b/sysdeps/nios2/nptl/bits/pthreadtypes-arch.h index bba904bcc4..7e71f723d0 100644 --- a/sysdeps/nios2/nptl/bits/pthreadtypes-arch.h +++ b/sysdeps/nios2/nptl/bits/pthreadtypes-arch.h @@ -31,13 +31,6 @@ #define __SIZEOF_PTHREAD_BARRIER_T 20 #define __SIZEOF_PTHREAD_BARRIERATTR_T 4 -/* Data structure for mutex handling. */ -#define __PTHREAD_COMPAT_PADDING_MID -#define __PTHREAD_COMPAT_PADDING_END -#define __PTHREAD_MUTEX_LOCK_ELISION 0 -#define __PTHREAD_MUTEX_NUSERS_AFTER_KIND 1 -#define __PTHREAD_MUTEX_USE_UNION 1 - #define __LOCK_ALIGNMENT #define __ONCE_ALIGNMENT diff --git a/sysdeps/nptl/bits/struct_mutex.h b/sysdeps/nptl/bits/struct_mutex.h new file mode 100644 index 0000000000..138320b0f3 --- /dev/null +++ b/sysdeps/nptl/bits/struct_mutex.h @@ -0,0 +1,84 @@ +/* Default mutex implementation struct definitions. + Copyright (C) 2019 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#ifndef _THREAD_MUTEX_INTERNAL_H +#define _THREAD_MUTEX_INTERNAL_H 1 + +/* Generic struct for both POSIX and C11 mutexes. New ports are expected + to use the default layout, however architecture can redefine it to + add arch-specific extension (such as lock-elision). The struct have + a size of 32 bytes on LP32 and 40 bytes on LP64 architectures. */ + +struct __pthread_mutex_s +{ + int __lock __LOCK_ALIGNMENT; + unsigned int __count; + int __owner; +#if __WORDSIZE == 64 + unsigned int __nusers; +#endif + /* KIND must stay at this position in the structure to maintain + binary compatibility with static initializers. + + Concurrency notes: + The __kind of a mutex is initialized either by the static + PTHREAD_MUTEX_INITIALIZER or by a call to pthread_mutex_init. + + After a mutex has been initialized, the __kind of a mutex is usually not + changed. BUT it can be set to -1 in pthread_mutex_destroy or elision can + be enabled. This is done concurrently in the pthread_mutex_*lock + functions by using the macro FORCE_ELISION. This macro is only defined + for architectures which supports lock elision. + + For elision, there are the flags PTHREAD_MUTEX_ELISION_NP and + PTHREAD_MUTEX_NO_ELISION_NP which can be set in addition to the already + set type of a mutex. Before a mutex is initialized, only + PTHREAD_MUTEX_NO_ELISION_NP can be set with pthread_mutexattr_settype. + + After a mutex has been initialized, the functions pthread_mutex_*lock can + enable elision - if the mutex-type and the machine supports it - by + setting the flag PTHREAD_MUTEX_ELISION_NP. This is done concurrently. + Afterwards the lock / unlock functions are using specific elision + code-paths. */ + int __kind; +#if __WORDSIZE != 64 + unsigned int __nusers; +#endif +#if __WORDSIZE == 64 + int __spins; + __pthread_list_t __list; +# define __PTHREAD_MUTEX_HAVE_PREV 1 +#else + __extension__ union + { + int __spins; + __pthread_slist_t __list; + }; +# define __PTHREAD_MUTEX_HAVE_PREV 0 +#endif +}; + +#if __PTHREAD_MUTEX_HAVE_PREV == 1 +# define __PTHREAD_MUTEX_INITIALIZER(__kind) \ + 0, 0, 0, 0, __kind, 0, { 0, 0 } +#else +# define __PTHREAD_MUTEX_INITIALIZER(__kind) \ + 0, 0, 0, 0, __kind, { 0 } +#endif + +#endif diff --git a/sysdeps/nptl/bits/thread-shared-types.h b/sysdeps/nptl/bits/thread-shared-types.h index f7eb8d4c5d..0727fdec96 100644 --- a/sysdeps/nptl/bits/thread-shared-types.h +++ b/sysdeps/nptl/bits/thread-shared-types.h @@ -32,36 +32,6 @@ __SIZEOF_PTHREAD_BARRIER_T - size of pthread_barrier_t. __SIZEOF_PTHREAD_BARRIERATTR_T - size of pthread_barrierattr_t. - Also, the following macros must be define for internal pthread_mutex_t - struct definitions (struct __pthread_mutex_s): - - __PTHREAD_COMPAT_PADDING_MID - any additional members after 'kind' - and before '__spin' (for 64 bits) or - '__nusers' (for 32 bits). - __PTHREAD_COMPAT_PADDING_END - any additional members at the end of - the internal structure. - __PTHREAD_MUTEX_LOCK_ELISION - 1 if the architecture supports lock - elision or 0 otherwise. - __PTHREAD_MUTEX_NUSERS_AFTER_KIND - control where to put __nusers. The - preferred value for new architectures - is 0. - __PTHREAD_MUTEX_USE_UNION - control whether internal __spins and - __list will be place inside a union for - linuxthreads compatibility. - The preferred value for new architectures - is 0. - - For a new port the preferred values for the required defines are: - - #define __PTHREAD_COMPAT_PADDING_MID - #define __PTHREAD_COMPAT_PADDING_END - #define __PTHREAD_MUTEX_LOCK_ELISION 0 - #define __PTHREAD_MUTEX_NUSERS_AFTER_KIND 0 - #define __PTHREAD_MUTEX_USE_UNION 0 - - __PTHREAD_MUTEX_LOCK_ELISION can be set to 1 if the hardware plans to - eventually support lock elision using transactional memory. - The additional macro defines any constraint for the lock alignment inside the thread structures: @@ -72,98 +42,39 @@ __ONCE_ALIGNMENT - for pthread_once_t/once_flag definition. And finally the internal pthread_rwlock_t (struct __pthread_rwlock_arch_t) - must be defined. - */ + must be defined. */ + #include <bits/pthreadtypes-arch.h> + /* Common definition of pthread_mutex_t. */ -#if !__PTHREAD_MUTEX_USE_UNION typedef struct __pthread_internal_list { struct __pthread_internal_list *__prev; struct __pthread_internal_list *__next; } __pthread_list_t; -#else + typedef struct __pthread_internal_slist { struct __pthread_internal_slist *__next; } __pthread_slist_t; -#endif - -/* Lock elision support. */ -#if __PTHREAD_MUTEX_LOCK_ELISION -# if !__PTHREAD_MUTEX_USE_UNION -# define __PTHREAD_SPINS_DATA \ - short __spins; \ - short __elision -# define __PTHREAD_SPINS 0, 0 -# else -# define __PTHREAD_SPINS_DATA \ - struct \ - { \ - short __espins; \ - short __eelision; \ - } __elision_data -# define __PTHREAD_SPINS { 0, 0 } -# define __spins __elision_data.__espins -# define __elision __elision_data.__eelision -# endif -#else -# define __PTHREAD_SPINS_DATA int __spins -/* Mutex __spins initializer used by PTHREAD_MUTEX_INITIALIZER. */ -# defin |