what is the difference between a library function and a system call
Liabrary fuction is fuction which are already compiled and stored in a
perticuler folder so that we can use is further, and system call is made by compiler.
System call is made by compiler to the operating system. whenever compiler face some problem to compile prolem it calls to OS for help
that is we call System call.
Most system calls are also library functions because the compiler needs the libraries in order to resolve functions at link time. There are a few exceptions, but very rare.
As already described by AD library calls are calls to functions/APIs exposed /exported by libraries (*.dll+*.lib in windows, *.so and *.a in Unix).
System calls are calling basic OS functions/APIs.
As most system APIs are provided by OS in form of libraries most system calls are library calls. The library calls that are NOT system calls are called library calls. :).
ALL library calls finally result in (low-level) system calls. This is because finally everything is done by kernel.
Liabrary fuction is fuction which are already compiled and stored in a perticuler folder so that we can use is further
and system call is made by compiler.
System call is made by compiler to the operating system. whenever compiler face some problem to compile prolem it calls to OS for help that is we call System call.
Why single out compiler like this?! If at all this is extremely confusing, like playing with words.
Library calls execute within the process space of the `C or C++ runtime' whereas System calls spawn a separate process and the control is transferred from the current process to the newly spawned one. Each process has a stack of its own. Library calls result in the creation of a new stack frame whereas system call result in the creation of a new stack.
Looks like some confusion of terminology -- I assume the term system call means an api function, not the system() function. The system() function does as ~S.O.S~ said in his post. But most os api functions are implemented as library functions as previously mentioned also.
I have a 2d matrix with dimension (3, n) called A, I want to calculate the normalization and cross product of two arrays (b,z) (see the code please) for each column (for the first column, then the second one and so on).
the function that I created to find the ...
Write a C program that should create a 10 element array of random integers (0 to 9). The program should total all of the numbers in the odd positions of the array and compare them with the total of the numbers in the even positions of the array and indicate ...
Hi. so this is actually a continuation from another question of mineHere but i was advised to start a new thread as the original question was already answered.
This is the result of previous question answered :
code for the listbox - datagridview interaction
At the top of the code ...