mirrors/cosmopolitan
1
0
Fork 0
mirror of https://github.com/jart/cosmopolitan.git synced 2025-06-28 15:28:30 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

Improve pthread_join()

Browse source 
Since we're now on Windows 8, we can have clone() work as advertised on
Windows, where it sends a futex wake to the child tid. It's also likely
we no longer need to work around thread flakes on OpenBSD, in _wait0().
This commit is contained in:
Justine Tunney 2022-09-16 14:02:06 -07:00
parent 3733b43a8f
commit 994e1f4386
No known key found for this signature in database
GPG key ID: BE714B4575D6E328
19 changed files with 154 additions and 74 deletions
Download patch file Download diff file Expand all files Collapse all files

3
libc/runtime/clone.c
View file

@ -26,6 +26,7 @@
#include "libc/limits.h"
#include "libc/macros.internal.h"
#include "libc/nt/runtime.h"
#include "libc/nt/synchronization.h"
#include "libc/nt/thread.h"
#include "libc/nt/thunk/msabi.h"
#include "libc/runtime/clone.internal.h"
@ -56,6 +57,7 @@
__msabi extern typeof(TlsSetValue) *const __imp_TlsSetValue;
__msabi extern typeof(ExitThread) *const __imp_ExitThread;
__msabi extern typeof(WakeByAddressAll) *const __imp_WakeByAddressAll;
struct CloneArgs {
union {
@ -106,6 +108,7 @@ WinThreadEntry(int rdi, // rcx
// we can now clear ctid directly since we're no longer using our own
// stack memory, which can now be safely free'd by the parent thread.
*wt->ztid = 0;
__imp_WakeByAddressAll(wt->ztid);
// since we didn't indirect this function through NT2SYSV() it's not
// safe to simply return, and as such, we just call ExitThread().
__imp_ExitThread(rc);