1 /***************************************************************************
2 * Copyright (c) 2024 Microsoft Corporation
3 *
4 * This program and the accompanying materials are made available under the
5 * terms of the MIT License which is available at
6 * https://opensource.org/licenses/MIT.
7 *
8 * SPDX-License-Identifier: MIT
9 **************************************************************************/
10
11
12 /**************************************************************************/
13 /**************************************************************************/
14 /** */
15 /** POSIX wrapper for THREADX */
16 /** */
17 /** */
18 /** */
19 /**************************************************************************/
20 /**************************************************************************/
21
22 /* Include necessary system files. */
23
24 #include "tx_api.h" /* Threadx API */
25 #include "pthread.h" /* Posix API */
26 #include "px_int.h" /* Posix helper functions */
27
28
29 /**************************************************************************/
30 /* */
31 /* FUNCTION RELEASE */
32 /* */
33 /* posix_memory_allocate PORTABLE C */
34 /* 6.1.7 */
35 /* AUTHOR */
36 /* */
37 /* William E. Lamie, Microsoft Corporation */
38 /* */
39 /* DESCRIPTION */
40 /* */
41 /* This function attempts to obtain the specified amount of memory */
42 /* from the POSIX heap. */
43 /* */
44 /* INPUT */
45 /* */
46 /* size Number of bytes in the pool */
47 /* memory_ptr Pointer to memory ptr variable*/
48 /* */
49 /* OUTPUT */
50 /* */
51 /* ERROR If error occurs */
52 /* retval Return value */
53 /* */
54 /* CALLS */
55 /* */
56 /* tx_byte_allocate Allocate from the pool */
57 /* posix_internal_error Generic posix error */
58 /* */
59 /* CALLED BY */
60 /* */
61 /* POSIX internal code */
62 /* */
63 /* RELEASE HISTORY */
64 /* */
65 /* DATE NAME DESCRIPTION */
66 /* */
67 /* 06-02-2021 William E. Lamie Initial Version 6.1.7 */
68 /* */
69 /**************************************************************************/
posix_memory_allocate(ULONG size,VOID ** memory_ptr)70 INT posix_memory_allocate(ULONG size, VOID **memory_ptr)
71 {
72
73 INT retval;
74
75 /* Init in case we fail. */
76 *memory_ptr = (VOID *)0;
77
78 /* Force all alignments to long word boundaries to be safe. */
79 if (size & 0x03)
80 {
81 /* Bump size up to next 4 byte boundary. */
82 size = ((size + 0x03) & ~0x03);
83 }
84 /* Attempt to allocate the desired memory from the POSIX heap.
85 Do not wait - if memory isn't available, flag an error. */
86 retval = tx_byte_allocate((TX_BYTE_POOL *)&posix_heap_byte_pool, memory_ptr,
87 size, TX_NO_WAIT);
88
89 /* Make sure the memory was obtained successfully. */
90 if (retval)
91 {
92 /* Error obtaining memory. */
93 posix_internal_error(555);
94 /* return error. */
95 return(ERROR);
96 }
97 /* Return to caller. */
98 return(retval);
99 }
100
