[PATCH] Clean pthread types namespaces on x86 and x86_64

[Juan Manuel Torres Palma]

This patch creates the file bits/pthread_ct.h which contains types
pthread_mutex_t and pthread_cond_t, that were previously in
pthreadtypes.h. The actual structure declaration
is in pthread_st.h, that stands for specific types, so now when
creating mtx_t and cnd_t structs, namespaces won't be corrupted.

It's my first ever patch so I wanted it to be a small one. A few more
are coming in the next couple days. I'm not sure if the patch format
is ok, if it isn't let me know and how to fix it. I attach the
changelog too because gmail doesn't allow me to use tabs here.

Cheers.

Tested for x86_64.

2015-06-23  Juan Manuel Torres Palma  <jmtorrespalma@gmail.com>

    * posix/Makefile (headers): Add files bits/pthread_ct.h and
    bits/pthread_st.h to this variable.
    * bits/pthread_ct: New file.
    (pthread_mutex_t): Move struct definition.
    (pthread_cond_t): Likewise.
    * sysdeps/x86/bits/pthread_st.h: New file.
    (__SIZEOF_PTHREAD_MUTEX_T): Definition.
    (__SIZEOF_PTHREAD_COND_T): Likewise.
    (__pthread_list_t) [__x86_64__]: Likewise.
    (__pthread_slist_t) [!__x86_64__]: Likewise.
    (__pthread_mutex_s): Likewise.
    (__PTHREAD_MUTEX_T_CONTENT): Likewise.
    (__PTHREAD_COND_T_CONTENT): Likewise.
    (__PTHREAD_MUTEX_HAVE_PREV)[__x86_64__]: Likewise
    (__elision)[!__x86_64__]: Likewise
    (__spins)[!__x86_64__]: Likewise
    (__PTHREAD_SPINS): Likewise
    * sysdeps/x86/bits/pthread_st.h: Include <bits/pthread_ct.h>.
    (__SIZEOF_PTHREAD_MUTEX_T): Remove.
    (__SIZEOF_PTHREAD_COND_T): Likewise.
    (__pthread_list_t): Likewise.
    (__pthread_slist_t): Likewise.
    (__pthread_mutex_s): Likewise.
    (__PTHREAD_MUTEX_T_CONTENT): Likewise.
    (__PTHREAD_COND_T_CONTENT): Likewise.
    (__PTHREAD_MUTEX_HAVE_PREV): Likewise
    (__elision): Likewise
    (__spins): Likewise
    (__PTHREAD_SPINS): Likewise

-- 
Juan Manuel Torres Palma.
Computer Science Student at Universidad de Granada.
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