GRASS GIS 7 Programmer's Manual
7.0.5(2016)-r00000
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GIS Library - Memory allocation routines. More...
#include <stdlib.h>
#include <grass/gis.h>
#include <grass/glocale.h>
Go to the source code of this file.
Functions | |
void * | G__malloc (const char *file, int line, size_t n) |
Memory allocation. More... | |
void * | G__calloc (const char *file, int line, size_t m, size_t n) |
Memory allocation. More... | |
void * | G__realloc (const char *file, int line, void *buf, size_t n) |
Memory reallocation. More... | |
void | G_free (void *buf) |
Free allocated memory. More... | |
void * | G_incr_void_ptr (const void *ptr, size_t size) |
Advance void pointer. More... | |
GIS Library - Memory allocation routines.
(C) 1999-2009 by the GRASS Development Team
This program is free software under the GNU General Public License (>=v2). Read the file COPYING that comes with GRASS for details.
Definition in file alloc.c.
void* G__calloc | ( | const char * | file, |
int | line, | ||
size_t | m, | ||
size_t | n | ||
) |
Memory allocation.
Allocates a properly aligned block of memory n*m bytes in length, initializes the allocated memory to zero, and returns a pointer to the allocated block of memory.
Dies with error message on memory allocation fail.
Note: Allocating memory for reading and writing raster maps is discussed in Allocating_Raster_I_O_Buffers.
file | fine name |
line | line number |
m | element size |
n | number of elements |
void* G__malloc | ( | const char * | file, |
int | line, | ||
size_t | n | ||
) |
Memory allocation.
Allocates a block of memory at least n bytes which is aligned properly for all data types. A pointer to the aligned block is returned.
Dies with error message on memory allocation fail.
file | file name |
line | line number |
n | number of elements |
void* G__realloc | ( | const char * | file, |
int | line, | ||
void * | buf, | ||
size_t | n | ||
) |
Memory reallocation.
Changes the size of a previously allocated block of memory at ptr and returns a pointer to the new block of memory. The size may be larger or smaller than the original size. If the original block cannot be extended "in place", then a new block is allocated and the original block copied to the new block.
Note: If buf is NULL, then this routine simply allocates a block of n bytes else buf must point to memory that has been dynamically allocated by G_malloc(), G_calloc(), G_realloc(), malloc(3), alloc(3), or realloc(3).. This routine works around broken realloc() routines, which do not handle a NULL buf.
file | file name | |
line | line number | |
[in,out] | buf | buffer holding original data |
[in] | n | array size |
void G_free | ( | void * | buf | ) |
Free allocated memory.
[in,out] | buf | buffer holding original data |
Definition at line 149 of file alloc.c.
Referenced by cairo_read_ppm(), cairo_write_ppm(), free_datum_list(), free_ellps_list(), free_fontcap(), free_slice_buff(), free_vol_buff(), free_volfile_buffs(), G__read_Cell_head(), G_file_name(), G_file_name_misc(), G_free_fmatrix(), G_free_fvector(), G_free_ilist(), G_free_imatrix(), G_free_ivector(), G_free_key_value(), G_free_list(), G_free_matrix(), G_free_tokens(), G_free_vector(), G_init_ilist(), G_list(), G_ls(), G_math_free_spmatrix(), G_math_free_spvector(), G_math_solver_sparse_gs(), G_math_solver_sparse_jacobi(), gk_free_key(), gk_make_linear_framesfromkeys(), gp_free_sitemem(), Gp_load_sites(), GPJ_free_datum(), GPJ_free_datum_transform(), GPJ_free_ellps(), GPJ_set_csv_loc(), gs_init_normbuff(), gs_malloc_lookup(), GS_write_ppm(), GS_write_tif(), gv_free_vectmem(), gvl_file_set_mode(), GVL_isosurf_del(), gvl_isosurf_freemem(), Gvl_unload_colors_data(), N_free_geom_data(), N_free_gradient_2d(), N_free_gradient_3d(), N_free_gradient_field_2d(), N_free_gradient_field_3d(), N_free_gradient_neighbours_2d(), N_free_gradient_neighbours_3d(), N_free_gradient_neighbours_x(), N_free_gradient_neighbours_y(), N_free_gradient_neighbours_z(), N_free_les(), N_init_geom_data_2d(), Nviz_destroy_render_window(), Nviz_draw_all_site(), Nviz_draw_all_vol(), Nviz_get_exag(), Nviz_set_focus_map(), path_free(), read_pgm(), Segment_release(), set_proj_lib(), and write_pgm().
void* G_incr_void_ptr | ( | const void * | ptr, |
size_t | size | ||
) |
Advance void pointer.
Advances void pointer by size bytes. Returns new pointer value.
Useful in raster row processing loops, substitutes
Now
(where rast is void* and data_type is RASTER_MAP_TYPE can be used instead of rast++.)
Very useful to generalize the row processing - loop i.e.
ptr | pointer |
size | buffer size |