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Removed semaphores from memp, changed sys_sem_wait calls into sys_arch_sem_wait calls to prevent timers from running while waiting for the heap. This fixes bug #19167.

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This commit is contained in:
goldsimon 2007-05-16 11:02:07 +00:00
parent 887077b5a4
commit fd982597fe
3 changed files with 9 additions and 32 deletions
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5
CHANGELOG
View File

@ -158,6 +158,11 @@ HISTORY
++ Bug fixes:
2007-05-16 Simon Goldschmidt
* mem.c, memp.c: Removed semaphores from memp, changed sys_sem_wait calls
into sys_arch_sem_wait calls to prevent timers from running while waiting
for the heap. This fixes bug #19167.
2007-05-13 Simon Goldschmidt
* tcp.h, sockets.h, sockets.c: Fixed bug from patch #5865 by moving the defines
for socket options (lwip_set/-getsockopt) used with level IPPROTO_TCP from

8
src/core/mem.c
View File

@ -171,7 +171,7 @@ mem_free(void *rmem)
LWIP_ASSERT("mem_free: sanity check alignment", (((mem_ptr_t)rmem) & (MEM_ALIGNMENT-1)) == 0);
/* protect the heap from concurrent access */
sys_sem_wait(mem_sem);
sys_arch_sem_wait(mem_sem, 0);
LWIP_ASSERT("mem_free: legal memory", (u8_t *)rmem >= (u8_t *)ram &&
(u8_t *)rmem < (u8_t *)ram_end);
@ -253,7 +253,7 @@ mem_realloc(void *rmem, mem_size_t newsize)
}
/* protect the heap from concurrent access */
sys_sem_wait(mem_sem);
sys_arch_sem_wait(mem_sem, 0);
#if MEM_STATS
lwip_stats.mem.used -= (size - newsize);
@ -319,7 +319,7 @@ mem_malloc(mem_size_t size)
return NULL;
}
sys_sem_wait(mem_sem);
sys_arch_sem_wait(mem_sem, 0);
for (ptr = (u8_t *)lfree - ram; ptr < MEM_SIZE_ALIGNED; ptr = ((struct mem *)&ram[ptr])->next) {
mem = (struct mem *)&ram[ptr];
@ -402,7 +402,7 @@ mem_malloc(mem_size_t size)
}
/* protect the heap from concurrent access */
sys_sem_wait(mem_sem);
sys_arch_sem_wait(mem_sem, 0);
/* Scan through the heap searching for a free block that is big enough,
* beginning with the lowest free block.

28
src/core/memp.c
View File

@ -111,10 +111,6 @@ static u8_t memp_memory[MEM_ALIGNMENT - 1 +
PBUF_POOL_SIZE * MEM_ALIGN_SIZE(PBUF_POOL_BUFSIZE) +
MEMP_TYPE_SIZE(MEMP_NUM_SYS_TIMEOUT, struct sys_timeo)];
#if !SYS_LIGHTWEIGHT_PROT
static sys_sem_t mutex;
#endif
#if MEMP_SANITY_CHECK
static int
memp_sanity(void)
@ -159,27 +155,17 @@ memp_init(void)
memp = (struct memp *)((u8_t *)memp + MEMP_SIZE + memp_sizes[i]);
}
}
#if !SYS_LIGHTWEIGHT_PROT
mutex = sys_sem_new(1);
#endif
}
void *
memp_malloc(memp_t type)
{
struct memp *memp;
#if SYS_LIGHTWEIGHT_PROT
SYS_ARCH_DECL_PROTECT(old_level);
#endif
LWIP_ASSERT("memp_malloc: type < MEMP_MAX", type < MEMP_MAX);
#if SYS_LIGHTWEIGHT_PROT
SYS_ARCH_PROTECT(old_level);
#else /* SYS_LIGHTWEIGHT_PROT */
sys_sem_wait(mutex);
#endif /* SYS_LIGHTWEIGHT_PROT */
memp = memp_tab[type];
@ -201,11 +187,7 @@ memp_malloc(memp_t type)
#endif /* MEMP_STATS */
}
#if SYS_LIGHTWEIGHT_PROT
SYS_ARCH_UNPROTECT(old_level);
#else /* SYS_LIGHTWEIGHT_PROT */
sys_sem_signal(mutex);
#endif /* SYS_LIGHTWEIGHT_PROT */
return (void*)memp;
}
@ -214,9 +196,7 @@ void
memp_free(memp_t type, void *mem)
{
struct memp *memp;
#if SYS_LIGHTWEIGHT_PROT
SYS_ARCH_DECL_PROTECT(old_level);
#endif /* SYS_LIGHTWEIGHT_PROT */
if (mem == NULL) {
return;
@ -226,11 +206,7 @@ memp_free(memp_t type, void *mem)
memp = (struct memp *)mem;
#if SYS_LIGHTWEIGHT_PROT
SYS_ARCH_PROTECT(old_level);
#else /* SYS_LIGHTWEIGHT_PROT */
sys_sem_wait(mutex);
#endif /* SYS_LIGHTWEIGHT_PROT */
#if MEMP_STATS
lwip_stats.memp[type].used--;
@ -243,9 +219,5 @@ memp_free(memp_t type, void *mem)
LWIP_ASSERT("memp sanity", memp_sanity());
#endif
#if SYS_LIGHTWEIGHT_PROT
SYS_ARCH_UNPROTECT(old_level);
#else /* SYS_LIGHTWEIGHT_PROT */
sys_sem_signal(mutex);
#endif /* SYS_LIGHTWEIGHT_PROT */
}