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author | Rich Felker <dalias@aerifal.cx> | 2014-06-10 04:49:49 -0400 |
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committer | Rich Felker <dalias@aerifal.cx> | 2014-06-10 04:49:49 -0400 |
commit | ac31bf278d9ed855e6765bb71d64ed19d2b7c0f8 (patch) | |
tree | 7bb84ee108a4ce18d69164e3bd28ca5f586f9d30 /src/internal/pthread_impl.h | |
parent | df15168cf8baf34fb9c94e19eaa1a5c79c853970 (diff) | |
download | musl-ac31bf278d9ed855e6765bb71d64ed19d2b7c0f8.tar.gz musl-ac31bf278d9ed855e6765bb71d64ed19d2b7c0f8.tar.bz2 musl-ac31bf278d9ed855e6765bb71d64ed19d2b7c0f8.tar.xz musl-ac31bf278d9ed855e6765bb71d64ed19d2b7c0f8.zip |
simplify errno implementation
the motivation for the errno_ptr field in the thread structure, which
this commit removes, was to allow the main thread's errno to keep its
address when lazy thread pointer initialization was used. &errno was
evaluated prior to setting up the thread pointer and stored in
errno_ptr for the main thread; subsequently created threads would have
errno_ptr pointing to their own errno_val in the thread structure.
since lazy initialization was removed, there is no need for this extra
level of indirection; __errno_location can simply return the address
of the thread's errno_val directly. this does cause &errno to change,
but the change happens before entry to application code, and thus is
not observable.
Diffstat (limited to 'src/internal/pthread_impl.h')
-rw-r--r-- | src/internal/pthread_impl.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/internal/pthread_impl.h b/src/internal/pthread_impl.h index 2e910b3e..650e8115 100644 --- a/src/internal/pthread_impl.h +++ b/src/internal/pthread_impl.h @@ -18,7 +18,7 @@ struct pthread { uintptr_t sysinfo; uintptr_t canary; pid_t tid, pid; - int tsd_used, errno_val, *errno_ptr; + int tsd_used, errno_val; volatile int cancel, canceldisable, cancelasync; int detached; unsigned char *map_base; |