Semaphores at Huntly. 4 November 2026. #railway #photography
November 8, 2026 at 8:00 AM
Semaphores at Huntly. 4 November 2026. #railway #photography
... and sw bought you back transformed, Josh #TheArchers
November 8, 2026 at 8:51 AM
... and sw bought you back transformed, Josh #TheArchers
Yes, the timing of my visit was rather fortuitous given that they started work on removing the semaphores less than a week later.
November 9, 2026 at 3:48 PM
Yes, the timing of my visit was rather fortuitous given that they started work on removing the semaphores less than a week later.
HST at Dalwhinnie. 3 November 2026. #railway #photography
November 7, 2026 at 8:00 AM
HST at Dalwhinnie. 3 November 2026. #railway #photography
I think semaphores were probably mentioned in Codebreakers, but it's been so long since I last read it that I don't remember a thing.
The Codebreakers - Wikipedia
en.wikipedia.org
November 7, 2026 at 10:54 AM
I think semaphores were probably mentioned in Codebreakers, but it's been so long since I last read it that I don't remember a thing.
Semaphores at Hastings. 7 October 2018. #railway #photography
November 2, 2026 at 7:33 AM
Semaphores at Hastings. 7 October 2018. #railway #photography
sorry Maine has to transmit vote totals via smoke signal in coastal regions and semaphores in hilly ones
November 4, 2026 at 4:23 AM
sorry Maine has to transmit vote totals via smoke signal in coastal regions and semaphores in hilly ones
Learn how mutual exclusion works in Verse language for UEFN. Compare C mutexes and semaphores with AI Runner lane reservations, retries, and expiring leases.
japanesetarheel.com/blog/mutual-...
#Verse #mutualexclusion #UEFN #mutex #semaphore #C
japanesetarheel.com/blog/mutual-...
#Verse #mutualexclusion #UEFN #mutex #semaphore #C
[UEFN/Verse Language] Mutual Exclusion: Comparison with C Language, Mutexes, and Semaphores
We can help you with your concerns. You can learn from us. This article explains mutual exclusion in
japanesetarheel.com
November 7, 2026 at 1:20 PM
Learn how mutual exclusion works in Verse language for UEFN. Compare C mutexes and semaphores with AI Runner lane reservations, retries, and expiring leases.
japanesetarheel.com/blog/mutual-...
#Verse #mutualexclusion #UEFN #mutex #semaphore #C
japanesetarheel.com/blog/mutual-...
#Verse #mutualexclusion #UEFN #mutex #semaphore #C
A successful single-process lease demo is not proof of production safety. CLAIM's examples include two independent workers and a local fencing broker. Review the boundary between coordination and downstream enforcement:
CLAIM API reference — AI Agent Huddle
Leases and capacity-limited semaphores for independent workers and agents. Renewable ownership with fencing tokens; REST, JavaScript and MCP.
claim.aiagenthuddle.com
November 6, 2026 at 10:02 AM
A successful single-process lease demo is not proof of production safety. CLAIM's examples include two independent workers and a local fencing broker. Review the boundary between coordination and downstream enforcement:
also like. one can implement mutexes using semaphores (trivially), or semaphores using mutexes (somewhat inefficiently). there is a somewhat vaguely defined distinction between structure and function (or interface) that usually gets handwaved & is rarely taught in (say) undergraduate CS
November 3, 2026 at 10:28 PM
also like. one can implement mutexes using semaphores (trivially), or semaphores using mutexes (somewhat inefficiently). there is a somewhat vaguely defined distinction between structure and function (or interface) that usually gets handwaved & is rarely taught in (say) undergraduate CS
The infamy of bugs is fascinating. With multiple threads, everyone knows you can have unintended volatility. But how many know you get deadlock from inconsistent nesting of semaphores. The infamy of the former makes it less common. The obscurity of the latter makes it more common.
November 8, 2026 at 6:29 PM
The infamy of bugs is fascinating. With multiple threads, everyone knows you can have unintended volatility. But how many know you get deadlock from inconsistent nesting of semaphores. The infamy of the former makes it less common. The obscurity of the latter makes it more common.
News to me: en.wikipedia.org/wiki/Futex
> a futex (short for ‘fast userspace mutex’) is a kernel system call that programmers can use to implement basic locking, or as a building block for higher-level locking abstractions such as semaphores and POSIX mutexes or condition variables.
> a futex (short for ‘fast userspace mutex’) is a kernel system call that programmers can use to implement basic locking, or as a building block for higher-level locking abstractions such as semaphores and POSIX mutexes or condition variables.
Futex - Wikipedia
en.wikipedia.org
November 1, 2026 at 2:06 PM
News to me: en.wikipedia.org/wiki/Futex
> a futex (short for ‘fast userspace mutex’) is a kernel system call that programmers can use to implement basic locking, or as a building block for higher-level locking abstractions such as semaphores and POSIX mutexes or condition variables.
> a futex (short for ‘fast userspace mutex’) is a kernel system call that programmers can use to implement basic locking, or as a building block for higher-level locking abstractions such as semaphores and POSIX mutexes or condition variables.
L’Aliaca décolle à la verticale : la DGA valide, les amiraux planent.
#aliaca #marine
#drone #navy
🚁⚓
https://www.opex360.com/2026/11/03/destinee-a-la-marine-nationale-la-version-vtol-du-drone-aliaca-a-ete-qualifiee-par-la-direction-generale-de-larmement/
#aliaca #marine
#drone #navy
🚁⚓
https://www.opex360.com/2026/11/03/destinee-a-la-marine-nationale-la-version-vtol-du-drone-aliaca-a-ete-qualifiee-par-la-direction-generale-de-larmement/
Destinée à la Marine nationale, la version VTOL du drone Aliaca a été qualifiée par la Direction générale de l’armement
Commandé à vingt-six exemplaires [onze en 2021 et quinze en 2024] auprès de Survey Copter, filiale d’Airbus Helicopters, afin d’équiper les frégates de surveillance, les patrouilleurs de haute-mer et les sémaphores, le système de mini-drones aériens embarqués pour la Marine [SMDM] Aliaca a donné, jusqu’à présent, pleinement satisfaction depuis son entrée en service. Utilisé pour...
Cet article Destinée à la Marine nationale, la version VTOL du drone Aliaca a été qualifiée par la Direction générale de l’armement est apparu en premier sur Zone Militaire.
www.opex360.com
November 4, 2026 at 6:44 PM
L’Aliaca décolle à la verticale : la DGA valide, les amiraux planent.
#aliaca #marine
#drone #navy
🚁⚓
https://www.opex360.com/2026/11/03/destinee-a-la-marine-nationale-la-version-vtol-du-drone-aliaca-a-ete-qualifiee-par-la-direction-generale-de-larmement/
#aliaca #marine
#drone #navy
🚁⚓
https://www.opex360.com/2026/11/03/destinee-a-la-marine-nationale-la-version-vtol-du-drone-aliaca-a-ete-qualifiee-par-la-direction-generale-de-larmement/
Thinking I'll place the semaphores here. The one on the far track will share the track circuit with the crossing signals so the only new block I will need to add will be one past the signal on the near track.
October 29, 2026 at 6:54 PM
Thinking I'll place the semaphores here. The one on the far track will share the track circuit with the crossing signals so the only new block I will need to add will be one past the signal on the near track.
Fencing tokens are integers, and precision matters. CLAIM's typed client preserves them as decimal strings; compare with BigInt rather than Number in JavaScript. Free beta; examples and limits:
CLAIM API reference — AI Agent Huddle
Leases and capacity-limited semaphores for independent workers and agents. Renewable ownership with fencing tokens; REST, JavaScript and MCP.
claim.aiagenthuddle.com
November 2, 2026 at 10:02 AM
Fencing tokens are integers, and precision matters. CLAIM's typed client preserves them as decimal strings; compare with BigInt rather than Number in JavaScript. Free beta; examples and limits:
Historically, semaphores were most often used.
Man Demonstrates Semaphore Flag Signaling
Alt: Man Demonstrates Semaphore Flag Signaling with one red flag and one yellow flag.
static.klipy.com
October 29, 2026 at 6:17 AM
Historically, semaphores were most often used.
Threw some of those LED bulbs in these semaphores, the glow is warm enough for me. They each use a different style of bulb to my surprise, the earlier one (with the smooth lenses) takes an Edison screw and the later one (ribbed lenses) takes a bayonet
October 29, 2026 at 6:39 PM
Threw some of those LED bulbs in these semaphores, the glow is warm enough for me. They each use a different style of bulb to my surprise, the earlier one (with the smooth lenses) takes an Edison screw and the later one (ribbed lenses) takes a bayonet
Advanced Programming in the #Unix Environment
Week 8: System V IPC
In this video lecture, we cover traditional System V IPC: semaphores, shared memory, and message queues (with a quick look at the POSIX message queues implementation). We can then translate those concepts to modern, distributed […]
Week 8: System V IPC
In this video lecture, we cover traditional System V IPC: semaphores, shared memory, and message queues (with a quick look at the POSIX message queues implementation). We can then translate those concepts to modern, distributed […]
Original post on mstdn.social
mstdn.social
October 31, 2026 at 3:52 PM
Advanced Programming in the #Unix Environment
Week 8: System V IPC
In this video lecture, we cover traditional System V IPC: semaphores, shared memory, and message queues (with a quick look at the POSIX message queues implementation). We can then translate those concepts to modern, distributed […]
Week 8: System V IPC
In this video lecture, we cover traditional System V IPC: semaphores, shared memory, and message queues (with a quick look at the POSIX message queues implementation). We can then translate those concepts to modern, distributed […]
Semaphores at Thornhill. 6 August 2026. #railway #photography
October 27, 2026 at 7:30 AM
Semaphores at Thornhill. 6 August 2026. #railway #photography
Exclusive ownership and bounded capacity solve different problems. CLAIM offers exclusive leases and capacity-limited semaphores, plus renewal and fencing tokens. Start free and check the API boundaries:
CLAIM API reference — AI Agent Huddle
Leases and capacity-limited semaphores for independent workers and agents. Renewable ownership with fencing tokens; REST, JavaScript and MCP.
claim.aiagenthuddle.com
October 28, 2026 at 10:02 AM
Exclusive ownership and bounded capacity solve different problems. CLAIM offers exclusive leases and capacity-limited semaphores, plus renewal and fencing tokens. Start free and check the API boundaries:
Possibly the first region to have no semaphores?
The one at Heckington of course also now has a sighting board, on top of that monstrous platform.
The one at Heckington of course also now has a sighting board, on top of that monstrous platform.
Departure from Heckington. 7 February 2026. #railway #photography
October 23, 2026 at 5:32 PM
Possibly the first region to have no semaphores?
The one at Heckington of course also now has a sighting board, on top of that monstrous platform.
The one at Heckington of course also now has a sighting board, on top of that monstrous platform.
Meanwhile here in the semaphore dessert that is East Anglia, the last semaphores have gone from Manea,March and Whittlesea😔.I must get the Skeggy line done as they're next to go.
October 23, 2026 at 5:23 PM
Meanwhile here in the semaphore dessert that is East Anglia, the last semaphores have gone from Manea,March and Whittlesea😔.I must get the Skeggy line done as they're next to go.
October 21, 2026 at 3:51 PM