Tarea 1: Sincronización de "threads"

Del curso Sistema Operativos Avanzados, de la Maestría de Ciencias de la Computación del Tecnológico de Costa Rica.

Equipo de trabajo:

• Carvajal Barboza Nicole
• González Villanueva Ruben
• López Díaz Edisson
• Mena Kikut Otto
• Soto Rojas Cristina

Uso del programa

Compilación

Se utiliza el compilador de GNU, el GCC, usando la siguiente línea:

gcc main.c -o main -lpthread -lm -w

• main.c: Nombre del archivo principal.
• -o: Indica el nombre del archivo de salida.
• main: Nombre del archivo de salida.
• -lpthread: Indica que se usarán pthreads.
• -lm: Indica que se usará math.
• -w: Indica que no imprima warnings.

Ejecución

Se usa el archivo de salida resultante de la compilación "main". Para ejecutarlo es suficiente con la siguiente línea: ./main

Sin embargo ésto ejecutará el programa con variables estándares que hemos definido, para indicar cuántos carros vienen del éste y del oeste se usan los parámetros, con la siguiente línea:

./main 4 5

Donde el primero, el 4, indica la cantidad de carros que quieren ingresar desde el este/derecha, y el segundo, el 5, la cantidad de carros que quieren ingresar desde el oeste/izquierda.

Opciones extras incluídas

Se incluyeron dos parámetros extra que son opcionales para indicar el lambda que se usará para la función exponencial para cada dirección, este/derecha y oeste/izquierda. Se hace uso de la siguiente manera:

./main 4 5 6 7

Donde el tercero, el 6, indica el lambda el este/derecha, y el cuarto, el 7, el lambda para el oeste/izquierda.

No funcional en el programa

Actualmente todo funciona en el programa y se programó tal como se solicitó en el enunciado.

---

Otros

Ejecuciones del programa

A continuación dos ejecuciones del programa, mostrando el comando de ejecución y las líneas impresas en consola del resultado.

Caso 1

Ejecución: ./main 3 3 15 15

Resultado:

Parameters set at: East cars: 3, West cars: 3, East lambda: 15, West lambda: 15
Before Thread
===================Left Times ============== 
Time = 2.612782 
Time = 4.853285 
Time = 8.171958 
===================Right Times ============== 
Time = 17.620624 
Time = 35.221855 
Time = 62.820526 
===================Total Times and Direction ==============
Time = 2.612782 Direction = -1 
Time = 4.853285 Direction = -1 
Time = 8.171958 Direction = -1 
Time = 17.620624 Direction = 1 
Time = 35.221855 Direction = 1 
Time = 62.820526 Direction = 1 


 ** BEGIN PROCESS TO PASS THE BRIDGE ** 


-655395072 (Left  ⬅️) Arrived a new car! 🚙💨 
-655395072 (Left  ⬅️) I'm the fist, I allow the Left  ⬅️ direction 🟢 🟢 
-655395072 (Left  ⬅️) I'll pass the bridge in a row, and now I'm the last 🟢 

-663787776 (Left  ⬅️) Arrived a new car! 🚙💨 
-663787776 (Left  ⬅️) It's my same direction 🟢 
-663787776 (Left  ⬅️) I'll pass the bridge in a row, and now I'm the last 🟢 
-655395072 (Left  ⬅️) I passed the bridge 🟢 

-672180480 (Left  ⬅️) Arrived a new car! 🚙💨 
-672180480 (Left  ⬅️) It's my same direction 🟢 
-672180480 (Left  ⬅️) I'll pass the bridge in a row, and now I'm the last 🟢 
-663787776 (Left  ⬅️) I passed the bridge 🟢 
-672180480 (Left  ⬅️) I passed the bridge 🟢 
-672180480 (Left  ⬅️) I was the last, the bridge is empty 🟡 


-680573184 (Right ➡️) Arrived a new car! 🚙💨 
-680573184 (Right ➡️) I'm the fist, I allow the Right ➡️ direction 🟢 🟢 
-680573184 (Right ➡️) I'll pass the bridge in a row, and now I'm the last 🟢 
-680573184 (Right ➡️) I passed the bridge 🟢 
-680573184 (Right ➡️) I was the last, the bridge is empty 🟡 


-688965888 (Right ➡️) Arrived a new car! 🚙💨 
-688965888 (Right ➡️) I'm the fist, I allow the Right ➡️ direction 🟢 🟢 
-688965888 (Right ➡️) I'll pass the bridge in a row, and now I'm the last 🟢 
-688965888 (Right ➡️) I passed the bridge 🟢 
-688965888 (Right ➡️) I was the last, the bridge is empty 🟡 


-697358592 (Right ➡️) Arrived a new car! 🚙💨 
-697358592 (Right ➡️) I'm the fist, I allow the Right ➡️ direction 🟢 🟢 
-697358592 (Right ➡️) I'll pass the bridge in a row, and now I'm the last 🟢 
-697358592 (Right ➡️) I passed the bridge 🟢 
-697358592 (Right ➡️) I was the last, the bridge is empty 🟡 

Caso 2

Ejecución: ./main 7 6 2 3

Resultado:

Parameters set at: East cars: 7, West cars: 6, East lambda: 2, West lambda: 3
Before Thread
===================Left Times ============== 
Time = 3.156758 
Time = 6.247203 
Time = 9.495758 
Time = 9.543585 
Time = 17.531501 
Time = 25.652481 
===================Right Times ============== 
Time = 3.773602 
Time = 7.449789 
Time = 10.267353 
Time = 13.422997 
Time = 15.114030 
Time = 19.688628 
Time = 19.851628 
===================Total Times and Direction ==============
Time = 3.156758 Direction = -1 
Time = 3.773602 Direction = 1 
Time = 6.247203 Direction = -1 
Time = 7.449789 Direction = 1 
Time = 9.495758 Direction = -1 
Time = 9.543585 Direction = -1 
Time = 10.267353 Direction = 1 
Time = 13.422997 Direction = 1 
Time = 15.114030 Direction = 1 
Time = 17.531501 Direction = -1 
Time = 19.688628 Direction = 1 
Time = 19.851628 Direction = 1 
Time = 25.652481 Direction = -1 


 ** BEGIN PROCESS TO PASS THE BRIDGE ** 


-993585408 (Left  ⬅️) Arrived a new car! 🚙💨 
-993585408 (Left  ⬅️) I'm the fist, I allow the Left  ⬅️ direction 🟢 🟢 
-993585408 (Left  ⬅️) I'll pass the bridge in a row, and now I'm the last 🟢 

-1001978112 (Right ➡️) Arrived a new car! 🚙💨 
-1001978112 (Right ➡️) I'll wait because bridge is in use 🔴 

-1010370816 (Left  ⬅️) Arrived a new car! 🚙💨 
-1010370816 (Left  ⬅️) It's my same direction 🟢 
-1010370816 (Left  ⬅️) I'll pass the bridge in a row, and now I'm the last 🟢 

-1018763520 (Right ➡️) Arrived a new car! 🚙💨 
-1018763520 (Right ➡️) I'll wait because bridge is in use 🔴 
-993585408  (Left  ⬅️) I passed the bridge 🟢 

-1027156224 (Left  ⬅️) Arrived a new car! 🚙💨 
-1027156224 (Left  ⬅️) It's my same direction 🟢 
-1027156224 (Left  ⬅️) I'll pass the bridge in a row, and now I'm the last 🟢 

-1035548928 (Left  ⬅️) Arrived a new car! 🚙💨 
-1035548928 (Left  ⬅️) It's my same direction 🟢 
-1035548928 (Left  ⬅️) I'll pass the bridge in a row, and now I'm the last 🟢 

-1043941632 (Right ➡️) Arrived a new car! 🚙💨 
-1043941632 (Right ➡️) I'll wait because bridge is in use 🔴 
-1010370816 (Left  ⬅️) I passed the bridge 🟢 

-1052334336 (Right ➡️) Arrived a new car! 🚙💨 
-1052334336 (Right ➡️) I'll wait because bridge is in use 🔴 

-1060727040 (Right ➡️) Arrived a new car! 🚙💨 
-1060727040 (Right ➡️) I'll wait because bridge is in use 🔴 
-1027156224 (Left  ⬅️) I passed the bridge 🟢 
-1035548928 (Left  ⬅️) I passed the bridge 🟢 
-1035548928 (Left  ⬅️) I was the last, the bridge is empty 🟡 

-1001978112 (Right ➡️) Now is my turn, I'll prepare to pass 🟡 
-1001978112 (Right ➡️) I'm the fist, I allow the Right ➡️ direction 🟢 🟢 
-1001978112 (Right ➡️) I'll pass the bridge in a row, and now I'm the last 🟢 
-1018763520 (Right ➡️) Now is my turn, I'll prepare to pass 🟡 
-1018763520 (Right ➡️) It's my same direction 🟢 
-1043941632 (Right ➡️) Now is my turn, I'll prepare to pass 🟡 
-1060727040 (Right ➡️) Now is my turn, I'll prepare to pass 🟡 
-1060727040 (Right ➡️) It's my same direction 🟢 
-1018763520 (Right ➡️) I'll pass the bridge in a row, and now I'm the last 🟢 
-1052334336 (Right ➡️) Now is my turn, I'll prepare to pass 🟡 
-1052334336 (Right ➡️) It's my same direction 🟢 
-1052334336 (Right ➡️) I'll pass the bridge in a row, and now I'm the last 🟢 
-1060727040 (Right ➡️) I'll pass the bridge in a row, and now I'm the last 🟢 
-1043941632 (Right ➡️) It's my same direction 🟢 
-1043941632 (Right ➡️) I'll pass the bridge in a row, and now I'm the last 🟢 

-1069119744 (Left  ⬅️) Arrived a new car! 🚙💨 
-1069119744 (Left  ⬅️) I'll wait because bridge is in use 🔴 

-1077512448 (Right ➡️) Arrived a new car! 🚙💨 
-1077512448 (Right ➡️) It's my same direction 🟢 
-1077512448 (Right ➡️) I'll pass the bridge in a row, and now I'm the last 🟢 

-1085905152 (Right ➡️) Arrived a new car! 🚙💨 
-1085905152 (Right ➡️) It's my same direction 🟢 
-1085905152 (Right ➡️) I'll pass the bridge in a row, and now I'm the last 🟢 
-1001978112 (Right ➡️) I passed the bridge 🟢 
-1018763520 (Right ➡️) I passed the bridge 🟢 
-1052334336 (Right ➡️) I passed the bridge 🟢 
-1060727040 (Right ➡️) I passed the bridge 🟢 
-1043941632 (Right ➡️) I passed the bridge 🟢 
-1077512448 (Right ➡️) I passed the bridge 🟢 
-1085905152 (Right ➡️) I passed the bridge 🟢 
-1085905152 (Right ➡️) I was the last, the bridge is empty 🟡 


-1094297856 (Left  ⬅️) Arrived a new car! 🚙💨 
-1069119744 (Left  ⬅️) Now is my turn, I'll prepare to pass 🟡 
-1069119744 (Left  ⬅️) I'm the fist, I allow the Left  ⬅️ direction 🟢 🟢 
-1069119744 (Left  ⬅️) I'll pass the bridge in a row, and now I'm the last 🟢 
-1094297856 (Left  ⬅️) I'm the fist, I allow the Left  ⬅️ direction 🟢 🟢 
-1069119744 (Left  ⬅️) I passed the bridge 🟢 
-1069119744 (Left  ⬅️) I was the last, the bridge is empty 🟡 

-1094297856 (Left  ⬅️) I'll pass the bridge in a row, and now I'm the last 🟢 
-1094297856 (Left  ⬅️) I passed the bridge 🟢 
-1094297856 (Left  ⬅️) I was the last, the bridge is empty 🟡 

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