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| author | Christopher Faylor <me@cgf.cx> | 2005-04-23 03:24:21 +0000 |
|---|---|---|
| committer | Christopher Faylor <me@cgf.cx> | 2005-04-23 03:24:21 +0000 |
| commit | bc79d164539c13d40ea7f3eac012bbabc17579cb (patch) | |
| tree | 0b4fafc4d63fe7463d07fd51091c1ddc346a00ee /winsup/cygwin/shared.cc | |
| parent | 098a429002612f8ceadbbd9c3bbdec7e944ee8f7 (diff) | |
| download | cygnal-bc79d164539c13d40ea7f3eac012bbabc17579cb.tar.gz cygnal-bc79d164539c13d40ea7f3eac012bbabc17579cb.tar.bz2 cygnal-bc79d164539c13d40ea7f3eac012bbabc17579cb.zip | |
* shared.cc (user_shared_initialize): Implement locking similar to shared_info
when initializing shared region.
Diffstat (limited to 'winsup/cygwin/shared.cc')
| -rw-r--r-- | winsup/cygwin/shared.cc | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/winsup/cygwin/shared.cc b/winsup/cygwin/shared.cc index 48caefff0..8798b2c4c 100644 --- a/winsup/cygwin/shared.cc +++ b/winsup/cygwin/shared.cc @@ -172,8 +172,9 @@ user_shared_initialize (bool reinit) ProtectHandleINH (cygwin_user_h); debug_printf ("user shared version %x", user_shared->version); + DWORD sversion = (DWORD) InterlockedExchange ((LONG *) &user_shared->version, USER_VERSION_MAGIC); /* Initialize the Cygwin per-user shared, if necessary */ - if (!user_shared->version) + if (!sversion) { user_shared->version = USER_VERSION_MAGIC; debug_printf ("initializing user shared"); @@ -189,6 +190,9 @@ user_shared_initialize (bool reinit) multiple_cygwin_problem ("user shared memory version", user_shared->version, USER_VERSION_MAGIC); else if (user_shared->cb != sizeof (*user_shared)) multiple_cygwin_problem ("user shared memory size", user_shared->cb, sizeof (*user_shared)); + else + while (!user_shared->cb) + low_priority_sleep (0); // Should be hit only very very rarely } void |