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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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13
third_party/nsync/mu_semaphore.c vendored
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@ -21,14 +21,9 @@
#include "third_party/nsync/mu_semaphore.internal.h"
__static_yoink("nsync_notice");
/* Apple's ulock (part by Cosmo futexes) is an internal API, but:
1. Unlike GCD it's cancellable, i.e. can be EINTR'd by signals
2. We currently always use ulock anyway for joining threads */
#define PREFER_GCD_OVER_ULOCK 1
/* Initialize *s; the initial value is 0. */
bool nsync_mu_semaphore_init (nsync_semaphore *s) {
if (PREFER_GCD_OVER_ULOCK && IsXnuSilicon ()) {
if (NSYNC_USE_GRAND_CENTRAL && IsXnuSilicon ()) {
return nsync_mu_semaphore_init_gcd (s);
} else if (IsNetbsd ()) {
return nsync_mu_semaphore_init_sem (s);
@ -44,7 +39,7 @@ bool nsync_mu_semaphore_init (nsync_semaphore *s) {
errno_t nsync_mu_semaphore_p (nsync_semaphore *s) {
errno_t err;
BEGIN_CANCELATION_POINT;
if (PREFER_GCD_OVER_ULOCK && IsXnuSilicon ()) {
if (NSYNC_USE_GRAND_CENTRAL && IsXnuSilicon ()) {
err = nsync_mu_semaphore_p_gcd (s);
} else if (IsNetbsd ()) {
err = nsync_mu_semaphore_p_sem (s);
@ -62,7 +57,7 @@ errno_t nsync_mu_semaphore_p (nsync_semaphore *s) {
errno_t nsync_mu_semaphore_p_with_deadline (nsync_semaphore *s, nsync_time abs_deadline) {
errno_t err;
BEGIN_CANCELATION_POINT;
if (PREFER_GCD_OVER_ULOCK && IsXnuSilicon ()) {
if (NSYNC_USE_GRAND_CENTRAL && IsXnuSilicon ()) {
err = nsync_mu_semaphore_p_with_deadline_gcd (s, abs_deadline);
} else if (IsNetbsd ()) {
err = nsync_mu_semaphore_p_with_deadline_sem (s, abs_deadline);
@ -75,7 +70,7 @@ errno_t nsync_mu_semaphore_p_with_deadline (nsync_semaphore *s, nsync_time abs_d
/* Ensure that the count of *s is at least 1. */
void nsync_mu_semaphore_v (nsync_semaphore *s) {
if (PREFER_GCD_OVER_ULOCK && IsXnuSilicon ()) {
if (NSYNC_USE_GRAND_CENTRAL && IsXnuSilicon ()) {
return nsync_mu_semaphore_v_gcd (s);
} else if (IsNetbsd ()) {
return nsync_mu_semaphore_v_sem (s);