thodg/libgit2/tests

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  • Hash : a1d34bc0
    Author : Shawn O. Pearce
    Date : 2008-12-30T21:49:38 

    Support building on Mac OS X by using pthread_getspecific for TLS

The Mach-O format does not permit gcc to implement the __thread
TLS specification, so we must instead emulate it using a single
int cell allocated from memory and stored inside of the thread
specific data associated with the current pthread.

What makes this tricky is git_errno must be a valid lvalue, so
we really need to return a pointer to the caller and deference it
as part of the git_errno macro.

The GCC-specific __attribute__((constructor)) extension is used
to ensure the pthread_key_t is allocated before any Git functions
are executed in the library, as this is necessary to access our
thread specific storage.

Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

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