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- Portable operating system industry standards
- standard for operating systems
something cannot move because something is in its way
passes command to the command interpreter which executes the string as an OS command
what is it and how many args?
- Loads and executes new child processes
- 1st - exe filename
- 2nd - same as the first becoming argv
- 3rd - same as first becoming argv
create and exe a new processs
- creates a new process and its primary thread.
- the new process runs in the security context of the calling process.
how many args and what are they?
- terminates the specified process and all of its threads
- hProcess[in] - the handle to the process to be terminated
- uExitCode[in] - the exit code to be used by the process and threads terminated as a result of this call
- waits until the specified object is in the signaled state or the time-out interval elapses
- If this handle is closed while the wait is still pending , the function's beaviour is undefined
waits until 1 or all of the objects are in the singled state or the time-out interval elapses
- suspends the exe of the current thread until the time-out interval elapses
- 5 seconds
What is an OS
- To manage the resources
- allows all resources to access the hardware the same way
Real time OS
- multi-user, multi-tasking, embedded
- use if you are using c++ and launching thread
- must use reinterpret_cast<handle>()
- List of instructions that perform a task
- Word = Application software -stuff we use
- Windows = System software - stuff the computer uses
- Backups = Utility software
- Havoc = Middleware -software that isn't used by itself
- Program being executed
- Code that is running
- Requires processor
- Requirements for run
- Memory, state, call stack
- needs at least 1 thread
- inside a process
- one of many paths of execution
- one machine only
what is do threads share?
- global memory
- static variables
what don't threads share?
- stack - local variables, function params
- CPU state