ucommon
|
Runtime functions. More...
#include <ucommon/platform.h>
Go to the source code of this file.
Functions | |
void * | cpr_memalloc (size_t size) |
Portable memory allocation helper function. More... | |
void * | cpr_memassign (size_t size, caddr_t address, size_t known) |
Portable memory placement helper function. More... | |
void | cpr_memswap (void *mem1, void *mem2, size_t size) |
Portable swap code. More... | |
void | cpr_runtime_error (const char *text) |
Function to handle runtime errors. More... | |
uint32_t | lsb_getlong (uint8_t *b) |
uint16_t | lsb_getshort (uint8_t *b) |
void | lsb_setlong (uint8_t *b, uint32_t v) |
void | lsb_setshort (uint8_t *b, uint16_t v) |
uint32_t | msb_getlong (uint8_t *b) |
uint16_t | msb_getshort (uint8_t *b) |
void | msb_setlong (uint8_t *b, uint32_t v) |
void | msb_setshort (uint8_t *b, uint16_t v) |
void * | operator new (size_t size, size_t extra) |
Overdraft new to allocate extra memory for object from heap. More... | |
void * | operator new (size_t size, caddr_t address) |
A placement new operator where we assume the size of memory is good. More... | |
void * | operator new (size_t size, caddr_t address, size_t known) |
A placement new operator where we know the allocated size. More... | |
Runtime functions.
This includes common runtime library functions we may need portably.
Definition in file cpr.h.
void* cpr_memalloc | ( | size_t | size | ) |
Portable memory allocation helper function.
Handles out of heap error as a runtime error.
size | of memory block to allocate from heap. |
void* cpr_memassign | ( | size_t | size, |
caddr_t | address, | ||
size_t | known | ||
) |
Portable memory placement helper function.
This is used to process "placement" new operators where a new object is constructed over a pre-allocated area of memory. This handles invalid values through runtime error.
size | of object being constructed. |
address | where the object is being placed. |
known | size of the location we are constructing the object in. |
void cpr_memswap | ( | void * | mem1, |
void * | mem2, | ||
size_t | size | ||
) |
Portable swap code.
mem1 | to swap. |
mem2 | to swap. |
size | of swap area. |
void cpr_runtime_error | ( | const char * | text | ) |
Function to handle runtime errors.
When using the standard C library, runtime errors are handled by a simple abort. When using the stdc++ library with stdexcept, then std::runtime_error will be thrown.
text | of runtime error. |
|
inline |
Overdraft new to allocate extra memory for object from heap.
This is used for objects that must have a known class size but store extra data behind the class. The last member might be an unsized or 0 element array, and the actual size needed from the heap is hence not the size of the class itself but is known by the routine allocating the object.
size | of object. |
extra | heap space needed for data. |
Definition at line 131 of file cpr.h.
|
inline |
A placement new operator where we assume the size of memory is good.
We construct the object at a specified place in memory which we assume is valid for our needs.
size | of memory needed for object. |
address | where to place object. |
Definition at line 142 of file cpr.h.
|
inline |
A placement new operator where we know the allocated size.
We find out how much memory is needed by the new and can prevent the object from exceeding the available space we are placing the object.
size | of memory needed for object. |
address | where to place object. |
known | size of location we are placing object. |
Definition at line 155 of file cpr.h.