4 commits

Author	SHA1	Message	Date
Sergey Bugaev	690141ff8b	LibPthread: Reimplement semaphores ... This implementation does not use locking or condition variables internally; it's purely based on atomics and futexes. Notably, concurrent sem_wait() and sem_post() calls can run *completely in parallel* without slowing each other down, as long as there are empty slots for them all to succeed without blocking. Additionally, sem_wait() never executes an atomic operation with release ordering, and sem_post() never executes an atomic operation with acquire ordering (unless you count the syscall). This means the compiler and the hardware are free to reorder code *into* the critical section.	2021-07-05 20:26:01 +02:00
Brian Gianforcaro	1682f0b760	Everything: Move to SPDX license identifiers in all files. ... SPDX License Identifiers are a more compact / standardized way of representing file license information. See: https://spdx.dev/resources/use/#identifiers This was done with the `ambr` search and replace tool. ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *	2021-04-22 11:22:27 +02:00
Gunnar Beutner	98403eccb0	LibPthread: Ensure we're not overflowing the semaphore's value	2021-04-15 09:31:49 +02:00
Gunnar Beutner	ea6d0aa1d4	LibPthread: Implement semaphore functions	2021-04-14 13:13:06 +02:00

Renamed from Userland/Libraries/LibC/semaphore.h (Browse further)