20000-310 | ADEPT| Ethernet controller chip module

Description

20000-310 | ADEPT| Ethernet controller chip module

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Therefore, the most common style of the C 20000-310 is inherently reentrant. However, unless carefully designed, drivers and certain other features will be non reentrant.
The key to making a function reentrant is to pause preemption of all access to peripheral device registers, including static local variables, persistent heap objects, and global variables in shared memory regions. This can be achieved by disabling one or more interrupts or obtaining and releasing mutexes. The details of the problem determine the best solution.
Best practice: Create and hide a mutex in each library or driver module, which is not inherently reentrant. Make obtaining this mutex a prerequisite for operating any persistent data or shared registers used throughout the entire module.

For example, the same mutex can be used to prevent competition involving Ethernet controller registers and global or static local packet counters. Before accessing this data, all functions in the module that 20000-310 this data must follow the protocol to obtain mutexes.
Note that non reentry features may enter your code repository as part of third-party middleware, older code, or device drivers.
It is unsettling that non 20000-310 functions may even be part of the standard C or C++libraries included with the compiler. If you are using the GNU compiler to build RTOS based applications, please note that you should use the reentrant “newlib” standard C library instead of the default library.

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