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Exercicio 3 – Sistemas Operacionais II – INE5424 – UFSC

Trabalho 3 – EPOS
System Object Destruction

    No exercício três deviamos implementar o controle de destrução de objetos, o qual não deve corromper o sistema e também deve estar de acordo com a semântica da linguagem de programação.
    A implementação adotada funciona da seguinte maneira: na class Thread foi adicionado um campo _container, nele é guardada a fila em que a Thread se encontra no momento. Os métodos desta classe foram alterados para que a consistência do campo _container seja mantida. No método join, por exemplo, o campo _container é atualizado com o endereço da fila _waiting_for_me do objeto em que se da join.
    Quando uma thread entra para o estado RUNNING o seu campo container não é atualizado, já que caso o mesmo seja deletado (ou auto-deletado), ele tentará se remover de uma fila em que não está, não causando mais problemas.
    Quando uma thread que possui elementos na sua fila _waiting_for_me é deletada, ela não acorda aquelas que a estão esperando, entrando em uma situação de deadlock. Nosso sistema, por conseguir detectar essa situação facilmente, gera um aviso. Porém, caso a Thread que tente se dar join já tiver sido destruída e removida da memória, a thread em execução trava, como nosso sistema não consegue detectar esse erro ele não é informado.
    Quando um objeto que extende a classe Synchronizer é deletado, seu destrutor chama wakeup_all, fazendo com que todos as threads que estiverem travadas nele continuem a execução.

Arquivos Modificados:
Thread.h
Thread.cc
Sycronizer.h

8.505 Comentários

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  4. So — have been messing about with this thing for something like five months now and it’s basically bookmarked at this point, so figured I’d write something up since a mate asked me the other day. Am based in the UK, mostly stick to footie and the horses, a fiver here and there, so take it how you like.

    What got me on it was genuinely pretty stupid — I couldn’t ever work out what an each way payout actually was once you get five places instead of three. I’d just eyeball it and then be surprised. Now punch the numbers in before every slip, even the boring singles.

    The single bet calculator is the bit I use most — you drop in your stake, the odds and you get the return instantly, fractional or decimal, doesn’t matter. It also handles the fiddly ones — acca and treble returns, lucky 15s, yankees, honestly that’s where most people I know mess it up. If you want a look, it lives at how to calculate each way bets — free, no signup.

    The thing that genuinely changed how I bet is the nerdier bits. The odds-to-probability calculator which shows you the overround, and there’s the kelly criterion calculator — I stick to fractional kelly as the full version is a quick route to a dead bankroll. The dutch tool gets used a fair bit when I’m splitting a race.

    It’s not perfect mind. The design feels pretty plain — no polish, it’s clearly function over form. Phone-wise it works though the acca grid need a bit of scrolling. Also there’s nothing on the app store, just the site — doesn’t bother me but worth saying.

    Anyway. Free, no ads shoved in your face, works. Anyone who still does the maths on paper, try it — it’s saved me a load of dumb bets I’d have regretted.

  5. OK — been using this thing for maybe five months now and it’s basically bookmarked at this point, reckon I’d chuck my thoughts in since someone asked me a few days back. I’m in the UK, generally bet football and racing, nothing mad, for context.

    How I found it was honestly pretty stupid — I could never figure out what an e/w return would be when the place terms changed. I used to just guess and moan when the payout landed. Now stick my stake in before every slip, even a straight one-selection punt.

    Their single bet calculator tool is the part I’m on daily — type in the price and your stake and it shows returns straight away, fractional or decimal, doesn’t matter. Same tool covers the multiples — acca and treble returns, a lucky 15, patents and yankees, and that’s where I always lose track. Have a go yourself, it’s here vig calculator decimal and there’s no login wall, which I appreciated.

    One thing that actually made a difference was the geekier tools. The odds-to-probability calculator and it makes obvious the overround, and a kelly criterion calculator — I stick to fractional kelly as the full version is terrifying. The dutching one is handy too if I’m covering two or three runners.

    Not all sunshine though. The layout is pretty plain — not much frills, looks like it was built by someone who cares more about maths than colours. On my phone it’s fine though the lucky 63 breakdown are a squeeze. And nothing on the app store, it’s browser only — fine by me but worth saying.

    So yeah. Free, no ads shoved in your face, does what it says. Anyone who honestly adds it up in their head, give it a go — saved me a fair few “wait, that’s it?” moments.

  6. OK — been on this thing for maybe a few months now and it’s basically bookmarked at this point, reckon I’d say something since a mate asked me last week. I’m UK based, mainly bet football and racing, nothing mad, for context.

    How I found it was genuinely embarrassing — I never could figure out what an each way payout would be once you get five places instead of three. Basically I’d eyeball it and get a shock. Now I punch the numbers in before every slip, even a simple single bet.

    The single bet calculator tool is the one I open most — you drop in your stake, the odds and it shows profit and total return instantly, fractional or decimal, doesn’t matter. Same tool covers the fiddly ones — acca and treble maths, lucky 15s, yankees, and that’s where most people I know mess it up. Have a go yourself, it’s here odds accumulator calculator — free, no signup.

    What actually shifted things for me were the geekier bits. The odds-to-probability calculator that shows what margin’s baked in, and a kelly staking calculator — I stick to fractional kelly as the full version is far too aggressive. The dutching one gets used a fair bit if I’m covering two or three runners.

    Couple of gripes. The interface feels pretty plain — not much polish, looks like it was built by someone who cares more about maths than colours. Phone-wise it’s usable but the acca grid make you pinch and zoom. Also there’s no app, just the site — slight shame but you asked.

    Anyway. Free, not plastered in adverts, does what it says. Anyone who still works out returns on a calculator app, have a look — saved me a fair few dumb bets I’d have regretted.

  7. Llevo unos cuantos meses con 888starz y sinceramente entre con la mosca detras de la oreja, porque en Espana te cansas de paginas que venden humo. Darse de alta no me llevo ni tres minutos, los datos basicos y fuera, y el deposito minimo es de 1 euro, asi puedes tantear sin jugarte el sueldo.

    De tragaperras hay una barbaridad — hablamos de mas de 7.000 slots repartidos entre Pragmatic Play, NetEnt, Play’n GO, Betsoft y Yggdrasil. Mis habituales son Gates of Olympus y Sweet Bonanza, aunque he tocado tambien los Megaways. Lo que me raya es que el buscador va un poco lento cuando hay tantisimo.

    La zona en vivo es de Evolution, basicamente y eso se nota: ruletas con crupieres de verdad, Crazy Time y Monopoly Live si te va el rollo espectaculo. La oferta de entrada es de un 100% hasta 300€ y unas 150 tiradas, el wagering esta en x40, nada raro comparado con otros. Va rotando algun free spin sin deposito, conviene revisar lo que hay vigente en 888starz download apk old version porque cambian cada mes.

    El tema de sacar pasta es lo que mas me ha sorprendido. Cobre hace poco por Skrill y entro casi al momento. Con tarjeta se va a dos o tres dias, nada nuevo. Aceptan tambien Neteller, cripto si no te asusta el tema.

    El movil cumple, la app de Android existe pero yo uso el navegador y me sobra. El soporte responde en espanol, me atendieron rapido con una duda de documentacion. Licencia de Curazao, asi que no es un.es regulado y conviene tenerlo claro. Yo sigo ahi, con sus cosas, pero ojo con el rollover de las promos.

  8. So — been using this thing for something like a few months now and it’s basically bookmarked at this point, so thought I’d say something since a mate asked me the other day. I’m in the UK, mostly bet football and racing, a fiver here and there, so take it how you like.

    What got me on it was genuinely embarrassing — I never could figure out what an each way return would be once you get five places instead of three. I used to just wing it and then be surprised. These days I type the odds in first, every time, even a simple single bet.

    Their single bet calculator is the one I open most — you put in the price and your stake and it shows profit and total return instantly, fractional or decimal, doesn’t matter. Same tool covers the bigger stuff — trebles returns, lucky 15 and lucky 63, a yankee, which is where I’d always mess it up. If you want a look, it’s here single stakes about bet calculator — free, no signup.

    One thing that genuinely made a difference were the nerdier bits. There’s an probability converter that shows how much the bookie’s taking, and a kelly criterion calculator — I run quarter kelly since full stakes are far too aggressive. Dutching calculator is decent for when I’m covering two or three runners.

    It’s not perfect mind. Its layout feels a bit basic — zero flash, which honestly I don’t mind but some will. On mobile it works but the lucky 63 breakdown are a squeeze. And no proper app, it’s browser only — slight shame but worth saying.

    So yeah. Free, barely any ads, does what it says. If anyone still does the maths on paper, try it — saves me plenty of “wait, that’s it?” moments.

  9. So — been using this thing for about six months now and it’s basically bookmarked at this point, so thought I’d write something up since a mate asked me last week. Am UK based, mostly bet football and racing, small stakes, just so you know where I’m coming from.

    What got me on it was actually embarrassing — I could never work out what an ew payout actually was once you get five places instead of three. I used to just wing it and moan when the payout landed. These days I punch the numbers in first, every time, even the boring singles.

    The single bet calculator is the one I’m on daily — you put in the price and your stake and it spits out the return straight away, fractional or decimal, doesn’t matter. Same tool covers the fiddly ones — trebles returns, lucky 15 and lucky 63, patents and yankees, honestly that’s where most people I know mess it up. Have a go yourself, it lives at betting overround calculator and it’s free with no account nonsense.

    The thing that actually changed how I bet is the more serious extras. There’s an odds-to-probability thing and it makes obvious how much the bookie’s taking, and a kelly criterion tool — I stick to fractional kelly as the full version is far too aggressive. Dutching calculator is decent when I’m spreading across selections.

    Not all sunshine though. The layout looks a bit basic — zero flash, which honestly I don’t mind but some will. Phone-wise it’s usable though the bigger tables need a bit of scrolling. And no proper app, it’s browser only — slight shame but you asked.

    Right, that’s me. Doesn’t cost anything, not plastered in adverts, does what it says. If you honestly does the maths on paper, try it — it’s saved me a load of arguments with the bookie.

  10. Aw, this was a very good post. Taking the time and actual effort to generate a really good article… but what can I say… I procrastinate a lot and never manage to get anything done.

  11. Vengo jugando unos cuantos meses en 888starz y para que mentir entre con la mosca detras de la oreja, porque en Espana uno se cansa de paginas que venden humo. Abrir la cuenta no me llevo ni dos minutos, correo, contrasena y listo, y el minimo para depositar esta en 1 euro, que para probar viene de lujo.

    En cuanto a maquinas tienen un catalogo enorme — creo que pasan de 8.000 juegos de proveedores como Pragmatic Play, NetEnt, Play’n GO, Betsoft y Yggdrasil. Yo tiro mucho de Gates of Olympus y Sweet Bonanza, si bien tambien le he dado a los Megaways. Lo que me raya es que encontrar un juego concreto es un lio cuando el catalogo es tan bestia.

    La zona en vivo es de Evolution, basicamente y eso se nota: mesas con crupier en espanol, Crazy Time y Monopoly Live que enganchan una barbaridad. La oferta de entrada va sobre el 130% y unas 100 tiradas gratis, con un rollover de x35, que es lo normal del mercado. Suele haber algun free spin sin deposito, puedes mirar las condiciones exactas directamente en 888starz official website porque cambian cada mes.

    El tema de sacar pasta es lo que mas me ha sorprendido. Cobre la semana pasada via e-wallet y entro casi al momento. Con tarjeta tarda mas, eso ya es cosa del banco. Van con Neteller, cripto que es lo mas rapido con diferencia.

    En el telefono va suave, hay APK para Android pero yo uso el navegador y me sobra. El chat de ayuda esta en espanol, me atendieron rapido con una duda de documentacion. La licencia es de Curazao, que no es la DGOJ y eso cada uno que lo valore. Yo sigo ahi, con sus cosas, pero ojo con el rollover de las promos.

  12. Ya llevo unos cuantos meses en 888starz y sinceramente tenia dudas al principio, ya que aqui en Espana uno se cansa de paginas que venden humo. Abrir la cuenta no me llevo ni un rato minimo, correo, contrasena y listo, y el deposito minimo esta en 1 euro, que para probar viene de lujo.

    En cuanto a maquinas tienen un catalogo enorme — andan por unos 10.000 juegos entre Pragmatic Play, NetEnt, Play’n GO, Betsoft y Yggdrasil. Yo me quedo en Sweet Bonanza y Book of Dead, eso si tambien le he dado a alguna de Microgaming. Lo que si encontrar un juego concreto es un lio cuando tienes 8.000 cosas delante.

    El casino en directo corre a cargo de Evolution y se nota la diferencia: mesas con crupier en espanol, los game shows tipo Crazy Time para el que le guste el show. La oferta de entrada ronda el 130% y unas 100 tiradas gratis, con un rollover de x40, que es lo normal del mercado. Va rotando bonos sin deposito de vez en cuando, yo miraria lo que hay vigente desde download 888starz app porque cambian cada mes.

    Los cobros me ha ido mejor de lo que pensaba. Cobre la semana pasada por Skrill y me llego en menos de una hora. Por Visa o Mastercard tarda mas, eso ya es cosa del banco. Van con Neteller, cripto que es lo mas rapido con diferencia.

    Desde el movil va suave, la app de Android existe pero yo uso el navegador y me sobra. El soporte responde en espanol, tardaron unos 10 minutos la vez que tuve un lio con la verificacion. La licencia es de Curazao, que no es la DGOJ y conviene tenerlo claro. Por ahora no me ha fallado, pero ojo con el rollover de las promos.

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  14. Jamesdox Jamesdox

    Длительное употребление спиртного наносит серьезный вред тканям внутренних органов и провоцирует тяжелейшую интоксикацию. В ситуациях, когда самостоятельный выход невозможен из-за сильной тошноты, рвоты и скачков давления, капельница от запоя становится оптимальным лечением для спасения здоровья. В отличие от лекарств в таблетках, инфузионная терапия даёт возможность максимально быстро очистить организм. Оперативная детоксикационная капельница обеспечивает вывод токсинов и восстановление работы жизненно важных органов — в этом состоит главная цель, которую ставит перед собой опытный врач-нарколог. Часто абстинентный синдром сопровождается паническими атаками и агрессией, что делает срочный вызов специалиста на дом единственно правильным шагом. С учетом состояния пациента врач определяет, можно ли поставить алкогольную капельницу на дому или требуется лечение в стационаре, чтобы избежать осложнений и защитить организм. В нашей наркологической клинике лечение алкоголизма начинается именно с безопасной детоксикации, которая проводится под контролем квалифицированного персонала. Гарантия результата подтверждена многолетней практикой и наличием всех необходимых лицензий.
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  15. Слушайте кто сталкивался Брат снова сорвался Дети напуганы Нужна срочная помощь на дому Короче, единственное что вытащило из запоя — вывод из запоя в спб с капельницей Поставили капельницу с детоксикационным раствором В общем, телефон и цены тут — вывод из запоя на дому спб дешево https://lechenie.vyvod-iz-zapoya-na-domu-sankt-peterburg-jfw.ru Не ждите пока станет хуже Перешлите тем кто в такой же ситуации

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