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Languages & runtimes · #c
Learn how C11’s _Generic keyword lets you write a single, type‑safe macro that expands to the correct abs‑family function for int, long, float, or double, with zero runtime cost.
Stop relying on member order in C structs. Designated initializers (.member = value) let you name fields at compile time, reducing bugs and improving readability.
Learn how to implement a high-throughput circular buffer in C using power-of-two masking and atomic indices to achieve O(1) performance without dynamic memory allocation.
In C (ISO/IEC 9899), pointer arithmetic is permitted within the bounds of an array, including one element past the end. However, dereferencing a pointer that has moved beyond this boundary triggers Undefined Behavior (UB). A specific concern arises when compiler optimizations (such as -O2 or -O3 ) are applied. Because the compiler assumes UB never occurs, it
C leaves the order in which function arguments and operands of most operators are evaluated unspecified, and it leaves sequencing of side effects to sequence points. This documented unspecified behavior means the same source can be legal yet produce different observable results across implementations and optimization levels. The goal is to characterize the p
In C development, calling free() on a pointer that has already been deallocated results in undefined behavior according to ISO/IEC 9899. While modern allocators like glibc attempt to mitigate this by monitoring chunk metadata, the specific response to corruption varies across different standard library implementations. When a double-free is detected, the run