malloc in A Sentence

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    Malloc was not declared within this scope.

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    2

    You don't need to cast Malloc()'s return value.

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    3

    Does using heap memory(Malloc/new) create a non-deterministic program?

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    4

    What REALLY happens when you don't free after Malloc?

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    5

    In what cases do I use Malloc vs new?

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    6

    Tuning it will only save a few calls to Malloc().

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    7

    AFAICT, Malloc never initializes its memory by definition in the C.

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    8

    You don't even need to cast return value of Malloc in C.

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    9

    The casting of Malloc is unnecessary in C but mandatory in C++.

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    10

    A call on Malloc() returns NULL because there is not enough memory, or.

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    11

    But if you free first, Malloc might re-use the freed memory instead.

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    12

    But if you program in C++, you should use new and not Malloc().

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    13

    C uses Malloc and C++ uses new, but many other languages have garbage collection.

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    14

    Unfortunately it's not as simple as"every call to Malloc will be counted in'sys' time".

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    15

    Finding a package that can work with both new/delete and Malloc/free obviously gives you more flexibility.

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    16

    Some operations that you do(like Malloc orfread/fwrite) will invoke these Kernel functions and that then will count as'sys' time.

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    17

    New allocations on the heap(by new or Malloc) are satisfied by creating a suitable block from one of the free blocks.

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    18

    I bet you could do an SO study that shows that Malloc() bugs are caught much faster when there's a cast.

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    19

    After returning from the kernel call, there will be some more time in'user' and then Malloc will return to your code.

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    20

    On the other hand, you can now Malloc() 9000 more blocks without increasing the amount of memory your program is tying up.

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    21

    It is not mandatory to cast the results of Malloc, since it returns void*, and a void* can be pointed to any datatype.

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    22

    The most common reason why people cast the result of Malloc is because they are unsure about how the C language works.

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    23

    Although Malloc without casting is preferred method and most experienced programmers choose it, you should use whichever you like having aware of the issues.

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    24

    A memory leak is when memory is dynamically allocated, eg with Malloc(), and all references to the memory are lost without the corresponding free.

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    25

    If the type of the pointer is changed at its declaration, one may also need to change all lines where Malloc is called and cast.

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    26

    Casting the value returned by Malloc() is not necessary now, but I would like to add one point that seems no one has pointed out:.

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    27

    Where we say something is limited only by available memory, that means that internal data structures impose no intrinsic limit, and space is allocated with Malloc or equivalent.

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    28

    You can store the result of Malloc into any pointer variable without a cast, because ISO C automatically converts the type void * to another type of pointer when necessary.

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    29

    Compare: Malloc(sizeof *sieve * length * width) vs. Malloc(length * width * sizeof *sieve) the second may overflow the length * width when width and length are smaller types than size_t.

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    30

    If you use Malloc in C there is no need to type cast it, as it will automatically type cast, However if your using C++ then you should type cast because Malloc will return a void* type.

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