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Make more improvements to threads and mappings

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- NetBSD should now have faster synchronization
- POSIX barriers may now be shared across processes
- An edge case with memory map tracking has been fixed
- Grand Central Dispatch is no longer used on MacOS ARM64
- POSIX mutexes in normal mode now use futexes across processes
This commit is contained in:
Justine Tunney 2024-07-24 01:05:00 -07:00
parent 2187d6d2dd
commit e398f3887c
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GPG key ID: BE714B4575D6E328
20 changed files with 566 additions and 171 deletions
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7
third_party/nsync/common.c vendored
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@ -37,6 +37,7 @@
#include "third_party/nsync/atomic.internal.h"
#include "third_party/nsync/common.internal.h"
#include "third_party/nsync/mu_semaphore.h"
#include "third_party/nsync/mu_semaphore.internal.h"
#include "third_party/nsync/wait_s.internal.h"
__static_yoink("nsync_notice");
@ -147,9 +148,9 @@ static void free_waiters_push (waiter *w) {
static void free_waiters_populate (void) {
int n;
if (IsNetbsd () || IsXnuSilicon ()) {
// netbsd needs one file descriptor per semaphore (!!)
// tim cook wants us to use his grand central dispatch
if (IsNetbsd () || (NSYNC_USE_GRAND_CENTRAL && IsXnuSilicon ())) {
// netbsd needs a real file descriptor per semaphore
// tim cook wants us to use his lol central dispatch
n = 1;
} else {
n = getpagesize() / sizeof(waiter);