25532151378

Committed 08 May 2026 01:45AM UTC coverage: 85.542% (+0.008%) from 85.534%

Build # 25532151378

Build Type

push

github

Committed by

saitoha

Commit Message

ci: fix experimental vcpkg checkout eol

Coverage Stats

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152560 of 178346 relevant lines covered (85.54%)

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86.21

/src/allocator.c

/*
 * SPDX-License-Identifier: MIT
 *
 * Copyright (c) 2021-2025 libsixel developers. See `AUTHORS`.
 * Copyright (c) 2014-2018 Hayaki Saito
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#if defined(HAVE_CONFIG_H)
#include "config.h"
#endif

/* STDC_HEADERS */
#include <stdlib.h>

#if HAVE_ASSERT_H
# include <assert.h>
#endif  /* HAVE_ASSERT_H */
#if HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif  /* HAVE_SYS_TYPES_H */
#if HAVE_ERRNO_H
# include <errno.h>
#endif  /* HAVE_ERRNO_H */
#if HAVE_MEMORY_H
# include <memory.h>
#endif  /* HAVE_MEMORY_H */

#include "allocator.h"
#include "malloc_stub.h"
#include "sixel_atomic.h"

/* create allocator object */
SIXELAPI SIXELSTATUS
sixel_allocator_new(
    sixel_allocator_t   /* out */ **ppallocator,  /* allocator object to be created */
    sixel_malloc_t      /* in */  fn_malloc,      /* custom malloc() function */
    sixel_calloc_t      /* in */  fn_calloc,      /* custom calloc() function */
    sixel_realloc_t     /* in */  fn_realloc,     /* custom realloc() function */
    sixel_free_t        /* in */  fn_free)        /* custom free() function */
{
    SIXELSTATUS status = SIXEL_FALSE;

    if (ppallocator == NULL) {
        sixel_helper_set_additional_message(
            "sixel_allocator_new: given argument ppallocator is null.");
        status = SIXEL_BAD_ARGUMENT;
        goto end;
    }

    if (fn_malloc == NULL) {
        fn_malloc = malloc;
    }

    if (fn_calloc == NULL) {
        fn_calloc = calloc;
    }

    if (fn_realloc == NULL) {
        fn_realloc = realloc;
    }

    if (fn_free == NULL) {
        fn_free = free;
    }

    *ppallocator = fn_malloc(sizeof(sixel_allocator_t));
    if (*ppallocator == NULL) {
        sixel_helper_set_additional_message(
            "sixel_allocator_new: fn_malloc() failed.");
        status = SIXEL_BAD_ALLOCATION;
        goto end;
    }

    (*ppallocator)->ref         = 1;
    (*ppallocator)->fn_malloc   = fn_malloc;
    (*ppallocator)->fn_calloc   = fn_calloc;
    (*ppallocator)->fn_realloc  = fn_realloc;
    (*ppallocator)->fn_free     = fn_free;

    status = SIXEL_OK;

end:
    return status;
}


/* destruct allocator object */
static void
sixel_allocator_destroy(
    sixel_allocator_t /* in */ *allocator)  /* allocator object to
                                               be destroyed */
{
    /* precondition */
    assert(allocator);
    assert(allocator->fn_free);

    allocator->fn_free(allocator);
}


/* increase reference count of allocator object (thread-safe) */
SIXELAPI void
sixel_allocator_ref(
    sixel_allocator_t /* in */ *allocator)  /* allocator object to be
                                               increment reference counter */
{
    unsigned int previous;

    /* precondition */
    assert(allocator);

    /*
     * Increment the reference counter atomically so concurrent users can
     * retain the allocator without racing against a release in another
     * thread.
     */
    previous = sixel_atomic_fetch_add_u32(&allocator->ref, 1U);
    (void)previous;
}


/* decrease reference count of output context object (thread-safe) */
SIXELAPI void
sixel_allocator_unref(
    sixel_allocator_t /* in */ *allocator)  /* allocator object to be unreference */
{
    unsigned int previous;

    if (allocator) {
        /*
         * Acquire the previous value atomically. The old count informs us
         * whether this thread dropped the last reference, which drives the
         * destruction path below.
         */
        previous = sixel_atomic_fetch_sub_u32(&allocator->ref, 1U);
        assert(previous > 0U);
        if (previous == 1U) {
            sixel_allocator_destroy(allocator);
        }
    }
}


/* call custom malloc() */
SIXELAPI void *
sixel_allocator_malloc(
    sixel_allocator_t   /* in */ *allocator,  /* allocator object */
    size_t              /* in */ n)           /* allocation size */
{
    /* precondition */
    assert(allocator);
    assert(allocator->fn_malloc);

    if (n == 0) {
        sixel_helper_set_additional_message(
            "sixel_allocator_malloc: called with n == 0");
        return NULL;
    }

    if (n > SIXEL_ALLOCATE_BYTES_MAX) {
        return NULL;
    }

    return allocator->fn_malloc(n);
}


/* call custom calloc() */
SIXELAPI void *
sixel_allocator_calloc(
    sixel_allocator_t   /* in */ *allocator,  /* allocator object */
    size_t              /* in */ nelm,        /* number of elements */
    size_t              /* in */ elsize)      /* size of element */
{
    size_t n;

    /* precondition */
    assert(allocator);
    assert(allocator->fn_calloc);

    n = nelm * elsize;

    if (n == 0) {
        sixel_helper_set_additional_message(
            "sixel_allocator_malloc: called with n == 0");
        return NULL;
    }

    if (n > SIXEL_ALLOCATE_BYTES_MAX) {
        return NULL;
    }

    return allocator->fn_calloc(nelm, elsize);
}


/* call custom realloc() */
SIXELAPI void *
sixel_allocator_realloc(
    sixel_allocator_t   /* in */ *allocator,  /* allocator object */
    void                /* in */ *p,          /* existing buffer to be re-allocated */
    size_t              /* in */ n)           /* re-allocation size */
{
    /* precondition */
    assert(allocator);
    assert(allocator->fn_realloc);

    if (n == 0) {
        sixel_helper_set_additional_message(
            "sixel_allocator_malloc: called with n == 0");
        return NULL;
    }

    if (n > SIXEL_ALLOCATE_BYTES_MAX) {
        return NULL;
    }

    return allocator->fn_realloc(p, n);
}


/* call custom free() */
SIXELAPI void
sixel_allocator_free(
    sixel_allocator_t   /* in */ *allocator,  /* allocator object */
    void                /* in */ *p)          /* existing buffer to be freed */
{
    /* precondition */
    assert(allocator);

    allocator->fn_free(p);
}



#if 0
int
rpl_posix_memalign(void **memptr, size_t alignment, size_t size)
{
#if HAVE_POSIX_MEMALIGN
    return posix_memalign(memptr, alignment, size);
#elif HAVE_ALIGNED_ALLOC
    *memptr = aligned_alloc(alignment, size);
    return *memptr ? 0: ENOMEM;
#elif HAVE_MEMALIGN
    *memptr = memalign(alignment, size);
    return *memptr ? 0: ENOMEM;
#elif HAVE__ALIGNED_MALLOC
    return _aligned_malloc(size, alignment);
#else
# error
#endif /* _MSC_VER */
}
#endif



/* emacs Local Variables:      */
/* emacs mode: c               */
/* emacs tab-width: 4          */
/* emacs indent-tabs-mode: nil */
/* emacs c-basic-offset: 4     */
/* emacs End:                  */
/* vim: set expandtab ts=4 sts=4 sw=4 : */
/* EOF */

1	/*
2	* SPDX-License-Identifier: MIT
3	*
4	* Copyright (c) 2021-2025 libsixel developers. See `AUTHORS`.
5	* Copyright (c) 2014-2018 Hayaki Saito
6	*
7	* Permission is hereby granted, free of charge, to any person obtaining a copy of
8	* this software and associated documentation files (the "Software"), to deal in
9	* the Software without restriction, including without limitation the rights to
10	* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
11	* the Software, and to permit persons to whom the Software is furnished to do so,
12	* subject to the following conditions:
13	*
14	* The above copyright notice and this permission notice shall be included in all
15	* copies or substantial portions of the Software.
16	*
17	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
19	* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
20	* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
21	* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22	* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23	*/
24
25	#if defined(HAVE_CONFIG_H)
26	#include "config.h"
27	#endif
28
29	/* STDC_HEADERS */
30	#include <stdlib.h>
31
32	#if HAVE_ASSERT_H
33	# include <assert.h>
34	#endif /* HAVE_ASSERT_H */
35	#if HAVE_SYS_TYPES_H
36	# include <sys/types.h>
37	#endif /* HAVE_SYS_TYPES_H */
38	#if HAVE_ERRNO_H
39	# include <errno.h>
40	#endif /* HAVE_ERRNO_H */
41	#if HAVE_MEMORY_H
42	# include <memory.h>
43	#endif /* HAVE_MEMORY_H */
44
45	#include "allocator.h"
46	#include "malloc_stub.h"
47	#include "sixel_atomic.h"
48
49	/* create allocator object */
50	SIXELAPI SIXELSTATUS
51	sixel_allocator_new(	108,932✔
52	sixel_allocator_t /* out / ppallocator, / allocator object to be created */
53	sixel_malloc_t /* in / fn_malloc, / custom malloc() function */
54	sixel_calloc_t /* in / fn_calloc, / custom calloc() function */
55	sixel_realloc_t /* in / fn_realloc, / custom realloc() function */
56	sixel_free_t /* in / fn_free) / custom free() function */
57	{
58	SIXELSTATUS status = SIXEL_FALSE;	108,932✔
59
60	if (ppallocator == NULL) {	108,932!
61	sixel_helper_set_additional_message(	×
62	"sixel_allocator_new: given argument ppallocator is null.");
63	status = SIXEL_BAD_ARGUMENT;	×
64	goto end;	×
65	}
66
67	if (fn_malloc == NULL) {	108,932✔
68	fn_malloc = malloc;	85,221✔
69	}	36,136✔
70
71	if (fn_calloc == NULL) {	107,674✔
72	fn_calloc = calloc;	85,222✔
73	}	36,136✔
74
75	if (fn_realloc == NULL) {	107,674✔
76	fn_realloc = realloc;	85,222✔
77	}	36,136✔
78
79	if (fn_free == NULL) {	107,674✔
80	fn_free = free;	85,222✔
81	}	36,136✔
82
83	*ppallocator = fn_malloc(sizeof(sixel_allocator_t));	108,932✔
84	if (*ppallocator == NULL) {	108,932!
85	sixel_helper_set_additional_message(	×
86	"sixel_allocator_new: fn_malloc() failed.");
87	status = SIXEL_BAD_ALLOCATION;	×
88	goto end;	×
89	}
90
91	(*ppallocator)->ref = 1;	108,932✔
92	(*ppallocator)->fn_malloc = fn_malloc;	108,932✔
93	(*ppallocator)->fn_calloc = fn_calloc;	108,932✔
94	(*ppallocator)->fn_realloc = fn_realloc;	108,932✔
95	(*ppallocator)->fn_free = fn_free;	108,932✔
96
97	status = SIXEL_OK;	108,932✔
98
99	end:	62,882✔
100	return status;	135,351✔
101	}	26,419✔
102
103
104	/* destruct allocator object */
105	static void
106	sixel_allocator_destroy(	108,908✔
107	sixel_allocator_t /* in / allocator) /* allocator object to
108	be destroyed */
109	{
110	/* precondition */
111	assert(allocator);	108,908!
112	assert(allocator->fn_free);	108,908!
113
114	allocator->fn_free(allocator);	108,908✔
115	}	108,908✔
116
117
118	/* increase reference count of allocator object (thread-safe) */
119	SIXELAPI void
120	sixel_allocator_ref(	1,380,627✔
121	sixel_allocator_t /* in / allocator) /* allocator object to be
122	increment reference counter */
123	{
124	unsigned int previous;	721,301✔
125
126	/* precondition */
127	assert(allocator);	1,380,627!
128
129	/*
130	* Increment the reference counter atomically so concurrent users can
131	* retain the allocator without racing against a release in another
132	* thread.
133	*/
134	previous = sixel_atomic_fetch_add_u32(&allocator->ref, 1U);	1,380,628✔
135	(void)previous;	986,774✔
136	}	1,380,627✔
137
138
139	/* decrease reference count of output context object (thread-safe) */
140	SIXELAPI void
141	sixel_allocator_unref(	1,489,588✔
142	sixel_allocator_t /* in / allocator) /* allocator object to be unreference */
143	{
144	unsigned int previous;	777,133✔
145
146	if (allocator) {	1,489,588!
147	/*
148	* Acquire the previous value atomically. The old count informs us
149	* whether this thread dropped the last reference, which drives the
150	* destruction path below.
151	*/
152	previous = sixel_atomic_fetch_sub_u32(&allocator->ref, 1U);	1,489,589!
153	assert(previous > 0U);	1,489,589!
154	if (previous == 1U) {	1,489,589✔
155	sixel_allocator_destroy(allocator);	108,908✔
156	}	46,041✔
157	}	687,240✔
158	}	1,489,590✔
159
160
161	/* call custom malloc() */
162	SIXELAPI void *
163	sixel_allocator_malloc(	18,800,464✔
164	sixel_allocator_t /* in / allocator, /* allocator object */
165	size_t /* in / n) / allocation size */
166	{
167	/* precondition */
168	assert(allocator);	18,800,464!
169	assert(allocator->fn_malloc);	18,800,655!
170
171	if (n == 0) {	18,800,615!
172	sixel_helper_set_additional_message(	×
173	"sixel_allocator_malloc: called with n == 0");
174	return NULL;	×
175	}
176
177	if (n > SIXEL_ALLOCATE_BYTES_MAX) {	18,800,453✔
178	return NULL;	34✔
179	}
180
181	return allocator->fn_malloc(n);	18,800,396✔
182	}	9,401,792✔
183
184
185	/* call custom calloc() */
186	SIXELAPI void *
187	sixel_allocator_calloc(	334,154✔
188	sixel_allocator_t /* in / allocator, /* allocator object */
189	size_t /* in / nelm, / number of elements */
190	size_t /* in / elsize) / size of element */
191	{
192	size_t n;	171,166✔
193
194	/* precondition */
195	assert(allocator);	334,154!
196	assert(allocator->fn_calloc);	334,154!
197
198	n = nelm * elsize;	334,151✔
199
200	if (n == 0) {	334,151!
201	sixel_helper_set_additional_message(	×
202	"sixel_allocator_malloc: called with n == 0");
203	return NULL;	×
204	}
205
206	if (n > SIXEL_ALLOCATE_BYTES_MAX) {	334,151!
207	return NULL;
208	}
209
210	return allocator->fn_calloc(nelm, elsize);	334,149✔
211	}	146,706✔
212
213
214	/* call custom realloc() */
215	SIXELAPI void *
216	sixel_allocator_realloc(	56,893✔
217	sixel_allocator_t /* in / allocator, /* allocator object */
218	void /* in / p, /* existing buffer to be re-allocated */
219	size_t /* in / n) / re-allocation size */
220	{
221	/* precondition */
222	assert(allocator);	56,893!
223	assert(allocator->fn_realloc);	56,893!
224
225	if (n == 0) {	56,893!
226	sixel_helper_set_additional_message(	×
227	"sixel_allocator_malloc: called with n == 0");
228	return NULL;	×
229	}
230
231	if (n > SIXEL_ALLOCATE_BYTES_MAX) {	56,893!
232	return NULL;
233	}
234
235	return allocator->fn_realloc(p, n);	56,893✔
236	}	21,189✔
237
238
239	/* call custom free() */
240	SIXELAPI void
241	sixel_allocator_free(	20,961,577✔
242	sixel_allocator_t /* in / allocator, /* allocator object */
243	void /* in / p) /* existing buffer to be freed */
244	{
245	/* precondition */
246	assert(allocator);	20,961,577!
247
248	allocator->fn_free(p);	20,961,580✔
249	}	20,962,195✔
250
251
252
253	#if 0
254	int
255	rpl_posix_memalign(void **memptr, size_t alignment, size_t size)
256	{
257	#if HAVE_POSIX_MEMALIGN
258	return posix_memalign(memptr, alignment, size);
259	#elif HAVE_ALIGNED_ALLOC
260	*memptr = aligned_alloc(alignment, size);
261	return *memptr ? 0: ENOMEM;
262	#elif HAVE_MEMALIGN
263	*memptr = memalign(alignment, size);
264	return *memptr ? 0: ENOMEM;
265	#elif HAVE__ALIGNED_MALLOC
266	return _aligned_malloc(size, alignment);
267	#else
268	# error
269	#endif /* _MSC_VER */
270	}
271	#endif
272
273
274
275	/* emacs Local Variables: */
276	/* emacs mode: c */
277	/* emacs tab-width: 4 */
278	/* emacs indent-tabs-mode: nil */
279	/* emacs c-basic-offset: 4 */
280	/* emacs End: */
281	/* vim: set expandtab ts=4 sts=4 sw=4 : */
282	/* EOF */

saitoha / libsixel / 25532151378

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