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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2017-11-09 19:41:02 -0200 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2019-11-26 13:53:36 +0000 |
| commit | 7df8af43ad1cd8ce527444de50bee6f35eebe071 (patch) | |
| tree | ebc286926fa33ca713f4cc4ad386aef0d094ae62 /sysdeps/nptl/pthread.h | |
| parent | 1c3f9acf1f1f75faa7a28bf39af64afda93839ac (diff) | |
| download | glibc-7df8af43ad1cd8ce527444de50bee6f35eebe071.tar.gz glibc-7df8af43ad1cd8ce527444de50bee6f35eebe071.tar.xz glibc-7df8af43ad1cd8ce527444de50bee6f35eebe071.zip | |
nptl: Add struct_rwlock.h
This patch adds a new generic __pthread_rwlock_arch_t definition meant
to be used by new ports. Its layout mimics the current usage on some
64 bits ports and it allows some ports to use the generic definition.
The arch __pthread_rwlock_arch_t definition is moved from
pthreadtypes-arch.h to another arch-specific header (struct_rwlock.h).
Also the static intialization macro for pthread_rwlock_t is set to use
an arch defined on (__PTHREAD_RWLOCK_INITIALIZER) which simplifies its
implementation.
The default pthread_rwlock_t layout differs from current ports with:
1. Internal layout is the same for 32 bits and 64 bits.
2. Internal flag is an unsigned short so it should not required
additional padding to align for word boundary (if it is the case
for the ABI).
Checked with a build on affected abis.
Change-Id: I776a6a986c23199929d28a3dcd30272db21cd1d0
Diffstat (limited to 'sysdeps/nptl/pthread.h')
| -rw-r--r-- | sysdeps/nptl/pthread.h | 27 |
1 files changed, 3 insertions, 24 deletions
diff --git a/sysdeps/nptl/pthread.h b/sysdeps/nptl/pthread.h index e673e3f4fc..a503b09993 100644 --- a/sysdeps/nptl/pthread.h +++ b/sysdeps/nptl/pthread.h @@ -105,34 +105,13 @@ enum PTHREAD_RWLOCK_DEFAULT_NP = PTHREAD_RWLOCK_PREFER_READER_NP }; -/* Define __PTHREAD_RWLOCK_INT_FLAGS_SHARED to 1 if pthread_rwlock_t - has the shared field. All 64-bit architectures have the shared field - in pthread_rwlock_t. */ -#ifndef __PTHREAD_RWLOCK_INT_FLAGS_SHARED -# if __WORDSIZE == 64 -# define __PTHREAD_RWLOCK_INT_FLAGS_SHARED 1 -# endif -#endif /* Read-write lock initializers. */ # define PTHREAD_RWLOCK_INITIALIZER \ - { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } } + { { __PTHREAD_RWLOCK_INITIALIZER (PTHREAD_RWLOCK_DEFAULT_NP) } } # ifdef __USE_GNU -# ifdef __PTHREAD_RWLOCK_INT_FLAGS_SHARED -# define PTHREAD_RWLOCK_WRITER_NONRECURSIVE_INITIALIZER_NP \ - { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ - PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP } } -# else -# if __BYTE_ORDER == __LITTLE_ENDIAN -# define PTHREAD_RWLOCK_WRITER_NONRECURSIVE_INITIALIZER_NP \ - { { 0, 0, 0, 0, 0, 0, PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP, \ - 0, 0, 0, 0 } } -# else -# define PTHREAD_RWLOCK_WRITER_NONRECURSIVE_INITIALIZER_NP \ - { { 0, 0, 0, 0, 0, 0, 0, 0, 0, PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP,\ - 0 } } -# endif -# endif +# define PTHREAD_RWLOCK_WRITER_NONRECURSIVE_INITIALIZER_NP \ + { { __PTHREAD_RWLOCK_INITIALIZER (PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP) } } # endif #endif /* Unix98 or XOpen2K */ |